AnswersFL-2000315-Biology 1 CRUnit Test

Unit Test — Unit test Answers

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21
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Photosynthesis is an example of

A
an exothermic reaction.
B
an endothermic reaction.
C
a reaction that gives off heat.
D
a reaction that emits energy.
22
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A testable hypothesis could be formed from which question?

A
Are bass more active in the daytime than at night?
B
When whales jump out of water, are they happy?
C
Are red tulips prettier than tulips of other colors?
D
Why are gerbils more popular as pets than hamsters are?
23

Mammals that live in the Arctic Ocean have a large amount of blubber, which is a fatty tissue just beneath the skin. Which statement best relates why these animals have so much blubber?

A
Lipids in blubber insulate the animals from cold water.
B
Proteins in blubber help the animals move to stay warm.
C
Carbohydrates in blubber provide all the energy that the animals need to stay warm.
D
Nucleic acids help build the lipids in blubber, which keep animals warm by regulating cell activities.
24

How does a catalyst work?

A
by increasing the temperature of a chemical reaction
B
by decreasing the pressure of a chemical reaction
C
by increasing the concentration of reactants in a reaction
D
by decreasing the activation energy of a reaction
25

Cellulose is found throughout the cell walls of plant cells. Cellulose makes cell walls rigid, which indicates that cellulose is a

A
carbohydrate.
B
lipid.
C
nucleic acid.
D
protein.
26

A substance that influences the reaction but does not participate in the reaction is a

A
catalyst
B
reactant
C
product
D
substrate
27

Read the passage below. It summarizes survey information.The Global Youth Tobacco Survey asks youth to fill in the answers to several questions about their tobacco use. In this survey conducted between 2000 and 2007, it was found that in youth ages 13-15, 12 percent of boys and 7 percent of girls reported smoking cigarettes. This information was shared and reported on the American Cancer Society website. The information was then used by several industries in the fields of health care, insurance, and education.What is a reason that these data may be unreliable?

A
The survey included information from both boys and girls.
B
It was found on the American Cancer Society website, and websites are unreliable.
C
It is information that is used for a variety of purposes and not just gathered for research.
D
It is from a self-reporting survey, and teens may not want to answer the questions honestly.
28

Sebastian wants to make ball-and-stick models of the four macromolecules. He has colored balls for each of the elements in these molecules, including the following. red: hydrogen black: carbon purple: oxygen green: nitrogenWhich molecule could he make that consists of long chains of red and black colored balls?

A
carbohydrates
B
lipids
C
nucleic acids
D
proteins
29

According to a recent encyclopedia entry about dog breeds, Labrador retrievers come in two specific breeds: English and American. The article cites six studies from several scientific journals about dog breeding showing that males of both breeds usually average 29-41 kg (65-90 lb) in weight, and females usually average 25-32 kg (55-70 lb) in weight. Anna’s female Labrador retriever weighs 38 kg (83 lb). What does Anna’s dog’s weight indicate about the reliability of this source?

A
This is still a reliable source because it clearly cites scientific research.
B
This is still a reliable source because it is a printed book, not the Internet.
C
This is no longer a reliable source because Anna disproved the studies.
D
This is no longer a reliable source because Anna’s dog’s weight is in the range for males.
30

Shawna is very knowledgeable about cars. She subscribes to several different automobile magazines, has interviewed people who work on cars for a living, and has researched many types of cars. She started a blog with the information she has gathered. On her blog, she offers opinions about which cars are the best value for the money and which are the most difficult to repair. Which best describes the reliability of her work?

A
It is unreliable because it is on the Internet.
B
It is unreliable because it offers opinions, not scientific facts.
C
It is reliable because she gathered information from many sources.
D
It is reliable because it has information about all types of cars, not just her favorites.
31

How are proteins and nucleic acids related?

A
They both provide energy.
B
They both carry genetic information.
C
The structure of proteins is determined by nucleic acids.
D
The subunits of nucleic acids are also the subunits of proteins.
32

Which statement best describes how a catalyst can speed up a chemical reaction?

A
The catalyst decreases the activation energy needed.
B
The catalyst increases the concentration of products.
C
The catalyst binds to enzymes to release substrates.
D
The catalyst increases the concentration of reactants.
33

Which macromolecule provides a person with the highest amount of energy per mass?

A
lipids
B
carbohydrates
C
nucleic acids
D
proteins
34

Which statement best describes the relationship between activation energy and rate of reaction?

A
Increasing the activation energy can increase the rate of a reaction.
B
Reducing the activation energy can increase the rate of a reaction.
C
Increasing the reaction energy does not alter the rate of reaction.
D
Reducing the activation energy can decrease the rate of a reaction.
35

The graph below compares the rates of reaction of a burning candle and an exploding firework.What can you conclude from the graph?

Question illustration
A
The reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn.
B
The reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn.
C
The reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn.
D
The reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn.
36

Which will increase the rate of a chemical reaction?

A
adding a catalyst
B
decreasing the pressure
C
decreasing the temperature
D
removing a catalyst
37

Which statement about enzymes is true?

A
An enzyme functions to decrease the rate of a chemical reaction.
B
Enzymes are proteins that function as catalysts in nonliving things.
C
Each enzyme can catalyze many different biochemical reactions.
D
Enzymes and substrates fit together like a lock and key.
38

Which occurs directly before forming a hypothesis?

A
proposing a law
B
drawing a conclusion
C
developing a testable question
D
analyzing experimental data
39

If Tyler does not eat a diet that includes essential amino acids, his cells will not be able to build

A
nucleic acids.
B
certain proteins.
C
cell membranes.
D
certain carbohydrates.
40

What is a substrate?

A
a molecule that acts as a catalyst
B
a place on the enzyme where the reaction occurs
C
a place on the product where the enzyme fits
D
a reactant that is catalyzed by an enzyme

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