Bio 100 Exam 1


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  • Question 1

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What are the temporary bonds between water molecules?
Answers: a.

covalent bonds

b.

hydrogen bonds

c.

ionic bonds

d.

government bonds

  • Question 2

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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 __________
Answers: a.

passive transport

b.

active transport

c.

diffusion

d.

osmotic transport

  • Question 3

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What is so special about human red blood cells?
Answers: a.

they are shaped just like a heart

b.

There is no DNA in them, as they have no nucleus

c.

they are not actually red

d.

they are immortal

  • Question 4

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The first step of cellular respiration is glycolysis. Where does this step occur in the cell?
Answers: a.

In the cell membrane (plasma membrane) around the entire cell

b.

In the thylacoid membranes which are arranged in stacks called grana

c.

In the cytoplasm of the cell, outside of the mitochondria

d.

In the mitochondrial membranes called cristae

  • Question 5

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Which of the following is NOT one of the parts of a nucleotide?
Answers: a.

sugar

b.

phosphate

c.

nitrogen-containing base

d.

amino acid

  • Question 6

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What is the molecule that leaves the Calvin Cycle to be converted into glucose?
Answers: a.

ADP

b.

G3P

c.

RuBP

d.

3-PGA

  • Question 7

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The polysaccharide that is found associated with the protein in meat is?
Answers: a.

cellulose

b.

starch

c.

glycogen

d.

glycerol

  • Question 8

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Which of the following is true regarding enzymes?
Answers: a.

enzymes are proteins that speed up metabolic reactions

b.

enzymes supply ATP to their substrates

c.

enzymes do not have specific substrates

d.

an enzyme may only be used once in a reaction

  • Question 9

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The photosynthetic light reactions occur in the……..?
Answers: a.

thylakoid membrane

b.

cytosol

c.

stroma

d.

nucleus

  • Question 10

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A fat with a glycerol + phosphate head and two fatty acid tails is ?
Answers: a.

a triglyceride

b.

a steroid

c.

a wax

d.

a phospholipid

  • Question 11

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Cellulose and starch are examples of……..?
Answers: a.

monosaccharides

b.

disaccharides

c.

polysaccharides

d.

structural lipids

  • Question 12

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Reactions where large molecules are broken down into small ones and energy is released are called?
Answers: a.

anabolic reactions

b.

thermodynamic reactions

c.

metabolic reactions

d.

catabolic reactions

  • Question 13

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Which type of bond represents a strong chemical bond?
Answers: a.

hydrogen

b.

ionic

c.

covalent

d.

van der Waals

  • Question 14

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A complex cell with a thickened cell wall, chloroplasts and a central vacuole is most likely?
Answers: a.

a bacterial cell

b.

an animal cell

c.

a plant cell

d.

a blood cell

  • Question 15

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The smallest unit of biological structure that meets the functional requirements of “living” is the……?
Answers: a.

organ

b.

organelle

c.

cell

d.

macromolecule

  • Question 16

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Which of the following is a polysaccharide?
Answers: a.

glucose

b.

cellulose

c.

fructose

d.

ribose

  • Question 17

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Which of the following sugars CANNOT be digested by the human body?
Answers: a.

cellulose

b.

glucose

c.

starch

d.

glycogen

  • Question 18

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During diffusion molecules like to move ____________
Answers: a.

from an area of higher concentration to an area of lower concentration

b.

from an area of lower concentration to an area of higher concentration

c.

in a way to maximize the amount of ATP that they use

d.

so all large molecules end up on the inside of a cell and small molecules stay outside

  • Question 19

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Which of the following is not one of the nitrogenous bases in DNA?
Answers: a.

adenine

b.

uracil

c.

guanine

d.

cytosine

  • Question 20

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What large molecule intercepts the photons from sunlight in plants and transfers the energy to a primary electron acceptor molecule?
Answers: a.

RuBisCo

b.

Chlorophyll

c.

Stroma

d.

FADH

  • Question 21

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Which of the following could easily cross a plasma membrane without help?
Answers: a.

large macromolecules (like glucose)

b.

small noncharged molecules (like oxygen and carbon dioxide)

c.

small charged molecules (like sodium and chloride)

d.

both “B” and “C”

  • Question 22

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Which of the following is not a component of the endomembrane system?
Answers: a.

mitochondrion

b.

Golgi apparatus

c.

endoplasmic reticulum

d.

lysosome

  • Question 23

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Where in plant cell chloroplasts does the Calvin Cycle take place?
Answers: a.

thylacoid membrane

b.

stroma

c.

granum

d.

chlorophyll

  • Question 24

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Enzymes can also be termed?
Answers: a.

catalytic proteins

b.

intolerant

c.

reactants

d.

green blobs of activity

  • Question 25

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The special diffusion of water molecules across a membrane is called?
Answers: a.

phosphorylation

b.

osmosis

c.

active transport

d.

selective permeability

  • Question 26

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What part of the energy spectrum that Earth receives from the sun, do plants use for photosynthesis?
Answers: a.

gamma rays and UV rays

b.

x-ray only

c.

visible light or photons

d.

all of the spectrum

  • Question 27

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What organelle in plants can expand when it receives water and provide rigidity to the plant?
Answers: a.

mitochondria

b.

golgi

c.

chloroplast

d.

central vacuole

  • Question 28

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A scientific hypothesis is……?
Answers: a.

an opinion

b.

a proposed explanation for an observation

c.

a fact

d.

easily proved true

  • Question 29

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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?
Answers: a.

a human cell

b.

an oak leaf cell

c.

a bacterial cell

d.

a eukaryotic cell

  • Question 30

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In photosynthesis where does the electron come from for a photon to excite?
Answers: a.

from the splitting of the water molecule into hydrogen and oxygen

b.

from carbon dioxide breakdown in the light reaction

c.

from the degradation of chlorophyll by photons

d.

from the photon itself

  • Question 31

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Water has a high heat-absorbing capacity because……?
Answers: a.

the transient hydrogen bonds between water molecules do not transfer heat efficiently

b.

the sun’s rays do not penetrate into water at all

c.

it has the ability to dissolve many heat-resistant solutes

d.

water molecules never bond together with one another and so heat cannot transfer

  • Question 32

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A fat molecule consists of?
Answers: a.

carbohydrates and proteins

b.

complex carbohydrates

c.

saturated oxygen atoms

d.

glycerol and fatty acids

  • Question 33

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Where does the oxygen come from that is a product of the photosynthesis reaction?
Answers: a.

from the complete breakdown of a sugar molecule into carbon, hydrogen and oxygen

b.

from the splitting of a water molecule

c.

from the breakdown of the other atmospheric gas, carbon dioxide

d.

from nowhere, as photosynthesis doesn’t produce oxygen

  • Question 34

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Cholesterol is often considered a bad molecule to have in your body, but what is a good use of cholesterol?
Answers: a.

it can line the inside of your arteries and decrease their internal volume and blood flow

b.

it is a signal molecule to tell your body to take up glucose after a meal

c.

it is a precursor for hormones like testosterone and estrogen

d.

none of the above, as cholesterol is never good for you

  • Question 35

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The principle difference between prokaryotic cells and eukaryotic cells is?
Answers: a.

only eukaryotic cells have a cell membrane

b.

only eukaryotic cells contain DNA

c.

only eukaryotic cells have a membrane-bound nucleus

d.

only eukaryotic cells are considered to be alive

  • Question 36

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Which of the following do all prokaryotes and eukaryotes share?
Answers: a.

plasma membrane

b.

organelles

c.

cell walls

d.

nuclear envelope

  • Question 37

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Which of the following is most likely to be considered a saturated fat?
Answers: a.

a fat that contains multiple double bonds

b.

a fat that is solid at room temperature

c.

a fat that contains mostly omega-3 fatty acids

d.

all of the above would be saturated fats

  • Question 38

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What is the common monosaccharide used as fuel for chemical reactions in your body?
Answers: a.

glycogen

b.

glucose

c.

cellulose

d.

sucrose

  • Question 39

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Which of the following statements is not true regarding water?
Answers: a.

Water is a polar molecule

b.

Water helps to stabilize and moderate temperature

c.

Water is essential for life

d.

Water is the most abundant atom in Earth’s atmosphere

  • Question 40

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Which of the following is not true about enzymes?
Answers: a.

They are usually made of amino acids

b.

They lower the activation energy of chemical reactions

c.

They are consumed by the reactions they catalyze

d.

Each one is specific to the particular substrate(s) to which it binds

  • Question 41

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Which of the following is an important function of water in your body?
Answers: a.

dispersing nutrients throughout your body

b.

helping to eliminate undigested waste

c.

helping to regulate body temperature

d.

all of the above

  • Question 42

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Which type of chemical bond is likely to form between the elements sodium (Na+) and chloride (Cl)?
Answers: a.

ionic

b.

hydrogen

c.

covalent

d.

Van der Waals

  • Question 43

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The main difference between saturated and unsaturated fats is?
Answers: a.

their color

b.

one has two fatty acid tails and the other has three fatty acid tails

c.

double bonds form between carbon in unsaturated fatty acid tails reducing the number of hydrogens

d.

one is an energy storage molecule and the other is not

  • Question 44

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What molecule pulls an electron through an electron transport chain in respiration?
Answers: a.

NADH as an electron acceptor

b.

oxaloacetate

c.

glucose

d.

oxygen as an electron acceptor

  • Question 45

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Protein polymers are composed of multiple monomers of ……?
Answers: a.

glucose residues

b.

amino acids

c.

ATP molecules

d.

steric acids

  • Question 46

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How many naturally occurring amino acids are there?
Answers: a.

millions

b.

22

c.

20

d.

4

  • Question 47

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Muscles may develop a cramp after they are worked out due to this process
Answers: a.

glycolysis

b.

lactic acid fermentation

c.

citric acid cycle

d.

alcohol fermentation

  • Question 48

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Which of the following is evidence that all life on Earth evolved from a common ancestor?
Answers: a.

all life is cellular

b.

all life uses the same DNA and RNA molecules

c.

all life is carbon-based

d.

all of the above

  • Question 49

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Which atomic component is found in the nucleus of an atom and has no electrical charge?
Answers: a.

protons

b.

electrons

c.

neutrons

d.

isotrons

  • Question 50

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What would be the consequence of having a cell that didn’t have mitochondria?
Answers: a.

you wouldn’t be able to capture energy from the sun

b.

you wouldn’t be able to make energy for the cell

c.

you wouldn’t be able to make proteins for the cell

d.

you wouldn’t be able to detoxify drugs