AnswersFL-2000310-Biology 1 Sem 1 - FlexCatalysts

Prokaryotic and Eukaryotic Cells Answers

25 verified answers
1
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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
2
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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.
3

Hemophilia is a disease that causes uncontrollable bleeding. If a father has it, all of his daughters will be carriers of the disease. Which macromolecule is involved in how hemophilia is passed from parents to their children?

A
carbohydrate
B
lipid
C
nucleic acid
D
protein
4

Organisms contain different levels of organization within their bodies. Arachnoidiscus ehrenbergi, pictured below, is a single-celled organism that is part of the group of algae known as diatoms. Photo by Gordon T. Taylor, courtesy of the NOAAWhich level of organization is seen in both Arachnoidiscus ehrenbergi and the human stomach?

Question illustration
A
cell
B
tissue
C
organ
D
organ system
5

A dietician asks a patient about the food that the patient eats and makes the table below to summarize the results.MacromoleculeSuggested percentage of dietActual percentage of dietCarbohydrates45–65%70%Lipids20–35%5%Proteins10–35%25%Based on the table, what advice do you think that the dietician will give the patient?

A
The patient should increase the amount of lean meats (proteins) and decrease the amount of oils in his or her diet.
B
The patient should decrease the amount of lean meats (proteins) and increase the amount of oils in his or her diet.
C
The patient should decrease the amount of rice and pasta and increase the amount of oils in his or her diet.
D
The patient should decrease the amount of rice and pasta and increase the amount of lean meats (proteins) in his or her diet.
6

Organisms may contain up to five levels of organization within their bodies. Which level of organization is best represented by the liver?

A
tissue
B
organ
C
organism
D
organ system
7

A scientist is examining the function of macromolecules in a cell. She notices that movement of large molecules into and out of the cell is disrupted when she damages one specific type of macromolecule. Which macromolecule has she most likely damaged?

A
a carbohydrate
B
a steroid
C
a nucleic acid
D
a protein
8

A patient has diabetes, a disease that causes high blood sugar levels. Which macromolecule will a dietician monitor most closely in a patient that has the disease?

A
carbohydrates
B
lipids
C
nucleic acids
D
proteins
9

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.
10

The heart is an example of which level of organization within an organism?

A
cell
B
organ
C
tissue
D
organ system
11

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.
12

Responding to the environment is a characteristic of life best shown by which example?

A
a human shivers on a cold day
B
a horse trots in a field
C
a dog swims in a pond
D
a cat licks its paws
13

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
14

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

A
lipids
B
carbohydrates
C
nucleic acids
D
proteins
15

How does a dietician help a patient?

A
A dietician treats vision problems.
B
A dietician cures genetic disorders.
C
A dietician performs surgery on patients to improve digestion.
D
A dietician helps patients get the proper amount of nutrients.
16

Which statement best describes the components of nucleic acids?

A
They are made up of chains of amino acids.
B
They are made up of carbon, hydrogen, and oxygen only.
C
They are made up almost entirely of carbon and hydrogen.
D
They are made up of nitrogenous bases, sugars, and phosphates.
17

When listing the levels of organization in organisms from least complex to most complex, which level is just below organs in complexity?

A
cell
B
organism
C
organ system
D
tissue
18

Which occurs when the body responds to the environment by maintaining a stable internal environment despite changing external conditions?

A
spontaneous generation
B
homeostasis
C
growth and development
D
reproduction
19

Which characteristic of life best describes the process of photosynthesis?

A
using energy
B
containing cells
C
reproducing
D
growing and developing
20

Which term describes an enzyme?

A
substrate
B
reactant
C
catalyst
D
product

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