Bio 100 Exam 1
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What are the temporary bonds between water molecules? |
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| Answers: |
a.
covalent bonds |
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b.
hydrogen bonds |
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c.
ionic bonds |
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d.
government bonds |
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The concentration of glucose inside of a cell is higher than the concentration outside of that cell, yet glucose continues to enter the cell. This is an example of __________ |
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| Answers: |
a.
passive transport |
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b.
active transport |
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c.
diffusion |
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d.
osmotic transport |
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What is so special about human red blood cells? |
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| Answers: |
a.
they are shaped just like a heart |
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b.
There is no DNA in them, as they have no nucleus |
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c.
they are not actually red |
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d.
they are immortal |
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The first step of cellular respiration is glycolysis. Where does this step occur in the cell? |
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| Answers: |
a.
In the cell membrane (plasma membrane) around the entire cell |
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b.
In the thylacoid membranes which are arranged in stacks called grana |
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c.
In the cytoplasm of the cell, outside of the mitochondria |
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d.
In the mitochondrial membranes called cristae |
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Which of the following is NOT one of the parts of a nucleotide? |
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| Answers: |
a.
sugar |
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b.
phosphate |
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c.
nitrogen-containing base |
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d.
amino acid |
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Download The Solution Here
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What is the molecule that leaves the Calvin Cycle to be converted into glucose? |
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| Answers: |
a.
ADP |
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b.
G3P |
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c.
RuBP |
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d.
3-PGA |
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The polysaccharide that is found associated with the protein in meat is? |
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| Answers: |
a.
cellulose |
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b.
starch |
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c.
glycogen |
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d.
glycerol |
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Which of the following is true regarding enzymes? |
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| Answers: |
a.
enzymes are proteins that speed up metabolic reactions |
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b.
enzymes supply ATP to their substrates |
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c.
enzymes do not have specific substrates |
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d.
an enzyme may only be used once in a reaction |
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The photosynthetic light reactions occur in the……..? |
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| Answers: |
a.
thylakoid membrane |
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b.
cytosol |
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c.
stroma |
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d.
nucleus |
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A fat with a glycerol + phosphate head and two fatty acid tails is ? |
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| Answers: |
a.
a triglyceride |
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b.
a steroid |
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c.
a wax |
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d.
a phospholipid |
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Cellulose and starch are examples of……..? |
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| Answers: |
a.
monosaccharides |
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b.
disaccharides |
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c.
polysaccharides |
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d.
structural lipids |
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Reactions where large molecules are broken down into small ones and energy is released are called? |
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| Answers: |
a.
anabolic reactions |
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b.
thermodynamic reactions |
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c.
metabolic reactions |
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d.
catabolic reactions |
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Which type of bond represents a strong chemical bond? |
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| Answers: |
a.
hydrogen |
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b.
ionic |
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c.
covalent |
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d.
van der Waals |
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A complex cell with a thickened cell wall, chloroplasts and a central vacuole is most likely? |
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| Answers: |
a.
a bacterial cell |
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b.
an animal cell |
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c.
a plant cell |
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d.
a blood cell |
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The smallest unit of biological structure that meets the functional requirements of “living” is the……? |
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| Answers: |
a.
organ |
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b.
organelle |
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c.
cell |
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d.
macromolecule |
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Which of the following is a polysaccharide? |
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| Answers: |
a.
glucose |
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b.
cellulose |
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c.
fructose |
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d.
ribose |
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Which of the following sugars CANNOT be digested by the human body? |
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| Answers: |
a.
cellulose |
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b.
glucose |
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c.
starch |
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d.
glycogen |
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During diffusion molecules like to move ____________ |
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| Answers: |
a.
from an area of higher concentration to an area of lower concentration |
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b.
from an area of lower concentration to an area of higher concentration |
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c.
in a way to maximize the amount of ATP that they use |
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d.
so all large molecules end up on the inside of a cell and small molecules stay outside |
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Which of the following is not one of the nitrogenous bases in DNA? |
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| Answers: |
a.
adenine |
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b.
uracil |
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c.
guanine |
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d.
cytosine |
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What large molecule intercepts the photons from sunlight in plants and transfers the energy to a primary electron acceptor molecule? |
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| Answers: |
a.
RuBisCo |
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b.
Chlorophyll |
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c.
Stroma |
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d.
FADH |
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Which of the following could easily cross a plasma membrane without help? |
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| Answers: |
a.
large macromolecules (like glucose) |
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b.
small noncharged molecules (like oxygen and carbon dioxide) |
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c.
small charged molecules (like sodium and chloride) |
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d.
both “B” and “C” |
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Which of the following is not a component of the endomembrane system? |
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| Answers: |
a.
mitochondrion |
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b.
Golgi apparatus |
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c.
endoplasmic reticulum |
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d.
lysosome |
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Where in plant cell chloroplasts does the Calvin Cycle take place? |
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| Answers: |
a.
thylacoid membrane |
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b.
stroma |
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c.
granum |
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d.
chlorophyll |
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Enzymes can also be termed? |
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| Answers: |
a.
catalytic proteins |
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b.
intolerant |
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c.
reactants |
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d.
green blobs of activity |
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The special diffusion of water molecules across a membrane is called? |
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| Answers: |
a.
phosphorylation |
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b.
osmosis |
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c.
active transport |
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d.
selective permeability |
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What part of the energy spectrum that Earth receives from the sun, do plants use for photosynthesis? |
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| Answers: |
a.
gamma rays and UV rays |
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b.
x-ray only |
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c.
visible light or photons |
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d.
all of the spectrum |
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What organelle in plants can expand when it receives water and provide rigidity to the plant? |
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| Answers: |
a.
mitochondria |
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b.
golgi |
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c.
chloroplast |
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d.
central vacuole |
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A scientific hypothesis is……? |
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| Answers: |
a.
an opinion |
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b.
a proposed explanation for an observation |
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c.
a fact |
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d.
easily proved true |
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You find a cell that has a cell wall, no membrane-bound nucleus, and little internal organization. Which of the following could this cell be? |
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| Answers: |
a.
a human cell |
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b.
an oak leaf cell |
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c.
a bacterial cell |
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d.
a eukaryotic cell |
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In photosynthesis where does the electron come from for a photon to excite? |
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| Answers: |
a.
from the splitting of the water molecule into hydrogen and oxygen |
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b.
from carbon dioxide breakdown in the light reaction |
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c.
from the degradation of chlorophyll by photons |
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d.
from the photon itself |
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Water has a high heat-absorbing capacity because……? |
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| Answers: |
a.
the transient hydrogen bonds between water molecules do not transfer heat efficiently |
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b.
the sun’s rays do not penetrate into water at all |
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c.
it has the ability to dissolve many heat-resistant solutes |
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d.
water molecules never bond together with one another and so heat cannot transfer |
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A fat molecule consists of? |
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| Answers: |
a.
carbohydrates and proteins |
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b.
complex carbohydrates |
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c.
saturated oxygen atoms |
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d.
glycerol and fatty acids |
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Where does the oxygen come from that is a product of the photosynthesis reaction? |
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| Answers: |
a.
from the complete breakdown of a sugar molecule into carbon, hydrogen and oxygen |
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b.
from the splitting of a water molecule |
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c.
from the breakdown of the other atmospheric gas, carbon dioxide |
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d.
from nowhere, as photosynthesis doesn’t produce oxygen |
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Cholesterol is often considered a bad molecule to have in your body, but what is a good use of cholesterol? |
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| Answers: |
a.
it can line the inside of your arteries and decrease their internal volume and blood flow |
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b.
it is a signal molecule to tell your body to take up glucose after a meal |
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c.
it is a precursor for hormones like testosterone and estrogen |
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d.
none of the above, as cholesterol is never good for you |
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The principle difference between prokaryotic cells and eukaryotic cells is? |
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| Answers: |
a.
only eukaryotic cells have a cell membrane |
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b.
only eukaryotic cells contain DNA |
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c.
only eukaryotic cells have a membrane-bound nucleus |
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d.
only eukaryotic cells are considered to be alive |
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Which of the following do all prokaryotes and eukaryotes share? |
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| Answers: |
a.
plasma membrane |
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b.
organelles |
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c.
cell walls |
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d.
nuclear envelope |
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Which of the following is most likely to be considered a saturated fat? |
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| Answers: |
a.
a fat that contains multiple double bonds |
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b.
a fat that is solid at room temperature |
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c.
a fat that contains mostly omega-3 fatty acids |
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d.
all of the above would be saturated fats |
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What is the common monosaccharide used as fuel for chemical reactions in your body? |
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| Answers: |
a.
glycogen |
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b.
glucose |
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c.
cellulose |
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d.
sucrose |
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Which of the following statements is not true regarding water? |
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| Answers: |
a.
Water is a polar molecule |
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b.
Water helps to stabilize and moderate temperature |
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c.
Water is essential for life |
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d.
Water is the most abundant atom in Earth’s atmosphere |
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Which of the following is not true about enzymes? |
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| Answers: |
a.
They are usually made of amino acids |
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b.
They lower the activation energy of chemical reactions |
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c.
They are consumed by the reactions they catalyze |
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d.
Each one is specific to the particular substrate(s) to which it binds |
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Which of the following is an important function of water in your body? |
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| Answers: |
a.
dispersing nutrients throughout your body |
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b.
helping to eliminate undigested waste |
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c.
helping to regulate body temperature |
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d.
all of the above |
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Which type of chemical bond is likely to form between the elements sodium (Na+) and chloride (Cl–)? |
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| Answers: |
a.
ionic |
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b.
hydrogen |
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c.
covalent |
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d.
Van der Waals |
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The main difference between saturated and unsaturated fats is? |
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| Answers: |
a.
their color |
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b.
one has two fatty acid tails and the other has three fatty acid tails |
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c.
double bonds form between carbon in unsaturated fatty acid tails reducing the number of hydrogens |
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d.
one is an energy storage molecule and the other is not |
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What molecule pulls an electron through an electron transport chain in respiration? |
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| Answers: |
a.
NADH as an electron acceptor |
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b.
oxaloacetate |
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c.
glucose |
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d.
oxygen as an electron acceptor |
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Protein polymers are composed of multiple monomers of ……? |
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| Answers: |
a.
glucose residues |
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b.
amino acids |
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c.
ATP molecules |
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d.
steric acids |
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How many naturally occurring amino acids are there? |
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| Answers: |
a.
millions |
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b.
22 |
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c.
20 |
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d.
4 |
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Muscles may develop a cramp after they are worked out due to this process |
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| Answers: |
a.
glycolysis |
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b.
lactic acid fermentation |
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c.
citric acid cycle |
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d.
alcohol fermentation |
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Which of the following is evidence that all life on Earth evolved from a common ancestor? |
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| Answers: |
a.
all life is cellular |
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b.
all life uses the same DNA and RNA molecules |
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c.
all life is carbon-based |
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d.
all of the above |
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Which atomic component is found in the nucleus of an atom and has no electrical charge? |
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| Answers: |
a.
protons |
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b.
electrons |
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c.
neutrons |
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d.
isotrons |
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What would be the consequence of having a cell that didn’t have mitochondria? |
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| Answers: |
a.
you wouldn’t be able to capture energy from the sun |
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b.
you wouldn’t be able to make energy for the cell |
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c.
you wouldn’t be able to make proteins for the cell |
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d.
you wouldn’t be able to detoxify drugs |
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