Question 1

Explain why a lack of oxygen in our cells causes less energy to be available to do cellular work.

Accepted Answer

The best responses will include a discus

Question 2

Match the following parts of cellular respiration with the appropriate description.

Accepted Answer

The answer of Match the following parts of cellular respiration...

Question 3

Which of the following is not a product of cellular respiration?

Accepted Answer

A) ATP 
B) carbon dioxide 
C) oxygen 
D) water 
E) all are products 
A) ATP 
B) carbon dioxide 
C) oxygen 
D) water 
E) all are products

Question 4

Hummingbirds' small size allows them to hover while extracting nectar from various flowers. This same small size requires large amounts of calories to maintain body temperature because

Accepted Answer

A) the breeze from their flapping wings constantly cools them off. 
B) hummingbirds only eat at night. 
C) they have a large body mass relative to their surface area. 
D) hovering requires less energy than forward flight. 
E) they have a large surface area relative to their body mass. 
A) the breeze from their flapping wings constantly cools them off. 
B) hummingbirds only eat at night. 
C) they have a large body mass relative to their surface area. 
D) hovering requires less energy than forward flight. 
E) they have a large surface area relative to their body mass.

Question 5

There is a certain amount of energy associated with the gasoline in your car. You know that you can only travel a certain distance before the gas is depleted. However, if energy cannot be destroyed, what happens to the energy that was stored in the gas after it turns the car's wheels?

Accepted Answer

All of the energy that was stored in the

Question 6

Explain why a high fever (over 105ºF)can be fatal for a person. Consider your knowledge of enzyme structure and the interactions between a specific enzyme and its substrate.

Accepted Answer

The best responses will include a discus

Question 7

In a cell,

Accepted Answer

A) energy-releasing reactions are coupled to energy-absorbing reactions. 
B) there are many more energy-absorbing reactions than energy-releasing reactions. 
C) energy-absorbing reactions and energy-releasing reactions are unlinked. 
D) energy-absorbing reactions are coupled to energy-releasing reactions via electron carriers. 
E) more energy is used up than is produced. 
A) energy-releasing reactions are coupled to energy-absorbing reactions. 
B) there are many more energy-absorbing reactions than energy-releasing reactions. 
C) energy-absorbing reactions and energy-releasing reactions are unlinked. 
D) energy-absorbing reactions are coupled to energy-releasing reactions via electron carriers. 
E) more energy is used up than is produced.

Question 8

Some people take creatine as a bodybuilding supplement. Describe the action of creatine in cells and why physicians do not recommend this supplement.

Accepted Answer

During a short burst of explosive action

Question 9

Describe the three energy systems found in humans.

Accepted Answer

The immediate energy system provides ene

Question 10

Using an ecosystem with which you are familiar (deciduous forest, grassland, desert, freshwater pond, etc.)draw a diagram of a food chain, using at least four organisms at different levels. Indicate in your diagram the ultimate source of energy. As much as possible, account for all of the energy as it moves through the chain.

Accepted Answer

Every student's answer will differ. No s

Question 11

In addition to glucose, can a cell use lipids or proteins for energy?

Accepted Answer

Oxidative energy system is based on cell

Question 12

The most common energy-carrying molecule in the cell is

Accepted Answer

A) AMP. 
B) ADP. 
C) ATP. 
D) adenine. 
E) DNA. 
A) AMP. 
B) ADP. 
C) ATP. 
D) adenine. 
E) DNA.

Question 13

The chemical reactions associated with metabolism

Accepted Answer

A) are energy absorbing. 
B) convert energy with 100% efficiency. 
C) are energy absorbing and energy releasing. 
D) are energy releasing. 
E) do not give off heat. 
A) are energy absorbing. 
B) convert energy with 100% efficiency. 
C) are energy absorbing and energy releasing. 
D) are energy releasing. 
E) do not give off heat.

Question 14

A stone is pushed from the top of a hill. Halfway to the bottom of the hill, this rolling stone

Accepted Answer

A) has potential energy only. 
B) has both potential energy and kinetic energy. 
C) is using up chemical energy. 
D) is constantly gaining more energy. 
E) has kinetic energy only. 
A) has potential energy only. 
B) has both potential energy and kinetic energy. 
C) is using up chemical energy. 
D) is constantly gaining more energy. 
E) has kinetic energy only.

Question 15

When you draw back a bow and shoot an arrow, the arrow exhibits kinetic energy as it moves through the air. As you know, energy cannot be created or destroyed. Thus, trace the origin of the kinetic energy of the arrow as far back as you can.

Accepted Answer

The kinetic energy of the arrow came fro

Question 16

Substances that start chemical reactions are called

Accepted Answer

A) substrata. 
B) starters. 
C) promoters. 
D) reactants. 
E) products. 
A) substrata. 
B) starters. 
C) promoters. 
D) reactants. 
E) products.

Question 17

A substrate

Accepted Answer

A) fits into the active site of a specific enzyme. 
B) fits into the active site of another specific substrate. 
C) catalyzes a chemical reaction. 
D) is always a protein. 
E) lowers the energy of activation in a chemical reaction. 
A) fits into the active site of a specific enzyme. 
B) fits into the active site of another specific substrate. 
C) catalyzes a chemical reaction. 
D) is always a protein. 
E) lowers the energy of activation in a chemical reaction.

Question 18

Human activities are responsible for an increase in the amount of atmospheric carbon dioxide. Many feel that the buildup of this gas is at least partly responsible for the greenhouse effect and global warming. Increased carbon dioxide may actually be a benefit to some plants since they need carbon dioxide for carbon-fixation. How will the greenhouse effect influence the biosphere? Even though experiments have shown increased carbon dioxide to be a boon for test plants, some scientists are still concerned about this phenomenon. Why?

Accepted Answer

The best responses will include discussi

Question 19

The main purpose of fermentation reactions is to

Accepted Answer

A) produce ATP. 
B) regenerate the electron carriers needed for glycolysis. 
C) produce the building blocks for biological molecules. 
D) prepare the pyruvate for the Krebs cycle. 
E) provide various products useful for man. 
A) produce ATP. 
B) regenerate the electron carriers needed for glycolysis. 
C) produce the building blocks for biological molecules. 
D) prepare the pyruvate for the Krebs cycle. 
E) provide various products useful for man.

Question 20

For the following chemical equation, label the reactants by placing an R beside them.
carbon dioxide__ + water__ + light energy $\rarr$ glucose__ + oxygen__

Accepted Answer

carbon dioxide(R) +

Exam 3: How Cells Take in and Use Energy

Explain why a lack of oxygen in our cells causes less energy to be available to do cellular work.

Match the following parts of cellular respiration with the appropriate description.

Which of the following is not a product of cellular respiration?

Hummingbirds' small size allows them to hover while extracting nectar from various flowers. This same small size requires large amounts of calories to maintain body temperature because

There is a certain amount of energy associated with the gasoline in your car. You know that you can only travel a certain distance before the gas is depleted. However, if energy cannot be destroyed, what happens to the energy that was stored in the gas after it turns the car's wheels?

Explain why a high fever (over 105ºF)can be fatal for a person. Consider your knowledge of enzyme structure and the interactions between a specific enzyme and its substrate.

In a cell,

Some people take creatine as a bodybuilding supplement. Describe the action of creatine in cells and why physicians do not recommend this supplement.

Describe the three energy systems found in humans.

In addition to glucose, can a cell use lipids or proteins for energy?

The most common energy-carrying molecule in the cell is

The chemical reactions associated with metabolism

A stone is pushed from the top of a hill. Halfway to the bottom of the hill, this rolling stone

When you draw back a bow and shoot an arrow, the arrow exhibits kinetic energy as it moves through the air. As you know, energy cannot be created or destroyed. Thus, trace the origin of the kinetic energy of the arrow as far back as you can.

Substances that start chemical reactions are called

A substrate

The main purpose of fermentation reactions is to

For the following chemical equation, label the reactants by placing an R beside them. carbon dioxide__ + water__ + light energy →\rarr→ glucose__ + oxygen__

What Is Life

Cells and the Chemistry of Life

The Cell Cycle

Patterns of Inheritance

DNA: The Thread of Life

Genes, Proteins, and Genetic Engineering

Reproduction and Development

The Mechanisms of Evolution

Lifes Origins and Biodiversity

Single-Celled Life

Fungi and Plants: Decomposers and Producers

The Evolution and Diversity of Animals

Ecology of Populations and Communities

Ecosystems and the Biosphere

Body Function, Survival, and the Steady State

Circulation and Respiration

Defense Against Disease

Animal Nutrition and Digestion

Hormones: Messengers of Change

The Nervous System

The Body in Motion

Plant Architecture and Function

Plant Growth, Hormones, and Engineering

The Dynamic Plant

Filters

For the following chemical equation, label the reactants by placing an R beside them. carbon dioxide + water + light energy $\rarr$ glucose + oxygen