Question 1

Diffusion does not require the cell to expend ATP.Therefore,diffusion is considered a type of

Accepted Answer

A) passive transport. 
B) endocytosis. 
C) exocytosis. 
D) active transport. 
A) passive transport. 
B) endocytosis. 
C) exocytosis. 
D) active transport.

Question 2

Which of the following processes can move a solute against its concentration gradient?

Accepted Answer

A) passive transport 
B) active transport 
C) osmosis 
D) facilitated diffusion 
A) passive transport 
B) active transport 
C) osmosis 
D) facilitated diffusion

Question 3

White blood cells (WBCs)are more resistant to lysis than red blood cells (RBCs).When looking at a sample of blood for WBCs,what could you do to reduce interference from RBCs?

Accepted Answer

A) Mix the blood in a hypotonic solution,which will cause the RBCs to lyse. 
B) Mix the blood in a hypertonic solution,which will cause the RBCs to lyse. 
C) Mix the blood in an isotonic solution and allow the WBCs to float to the top. 
D) Mix the blood in a salty solution to cause the RBCs to lyse. 
A) Mix the blood in a hypotonic solution,which will cause the RBCs to lyse. 
B) Mix the blood in a hypertonic solution,which will cause the RBCs to lyse. 
C) Mix the blood in an isotonic solution and allow the WBCs to float to the top. 
D) Mix the blood in a salty solution to cause the RBCs to lyse.

Question 4

In a hypotonic solution,an animal cell will

Accepted Answer

A) shrivel. 
B) neither gain nor lose water. 
C) experience turgor. 
D) lyse. 
A) shrivel. 
B) neither gain nor lose water. 
C) experience turgor. 
D) lyse.

Question 5

Heating inactivates enzymes by

Accepted Answer

A) causing enzyme molecules to stick together. 
B) breaking the covalent bonds that hold the molecule together. 
C) removing phosphate groups from the enzyme. 
D) changing the enzyme's three- dimensional shape. 
A) causing enzyme molecules to stick together. 
B) breaking the covalent bonds that hold the molecule together. 
C) removing phosphate groups from the enzyme. 
D) changing the enzyme's three- dimensional shape.

Question 6

Which of the following statements regarding enzyme function is false?

Accepted Answer

A) An enzyme's function depends on its three- dimensional shape. 
B) Enzymes emerge unchanged from the reactions they catalyze. 
C) Enzymes are very specific for certain substrates. 
D) Enzymes are used up when they catalyze a chemical reaction,so must be synthesized for each new chemical reaction. 
A) An enzyme's function depends on its three- dimensional shape. 
B) Enzymes emerge unchanged from the reactions they catalyze. 
C) Enzymes are very specific for certain substrates. 
D) Enzymes are used up when they catalyze a chemical reaction,so must be synthesized for each new chemical reaction.

Question 7

Which of the following statements regarding membrane function is false?

Accepted Answer

A) The plasma membrane is the control center of the cell. 
B) The plasma membrane has receptors for chemical messages. 
C) The plasma membrane forms a selective barrier around the cell. 
D) The plasma membrane plays a role in signal transduction. 
A) The plasma membrane is the control center of the cell. 
B) The plasma membrane has receptors for chemical messages. 
C) The plasma membrane forms a selective barrier around the cell. 
D) The plasma membrane plays a role in signal transduction.

Question 8

The process of a white blood cell engulfing a bacterium is

Accepted Answer

A) pinocytosis. 
B) osmosis. 
C) receptor- mediated endocytosis. 
D) phagocytosis. 
A) pinocytosis. 
B) osmosis. 
C) receptor- mediated endocytosis. 
D) phagocytosis.

Question 9

Small,nonpolar,hydrophobic molecules such as fatty acids

Accepted Answer

A) require transport proteins to pass through a membrane's lipid bilayer. 
B) easily pass through a membrane's lipid bilayer. 
C) very slowly diffuse through a membrane's lipid bilayer. 
D) are actively transported across cell membranes. 
A) require transport proteins to pass through a membrane's lipid bilayer. 
B) easily pass through a membrane's lipid bilayer. 
C) very slowly diffuse through a membrane's lipid bilayer. 
D) are actively transported across cell membranes.

Question 10

Which of the following is a typical feature of an ATP- driven active transport mechanism?

Accepted Answer

A) The solute moves against the concentration gradient. 
B) The transport protein must cross to the correct side of the membrane before the solute can bind to it. 
C) The transport protein is irreversibly phosphorylated as transport takes place. 
D) The transport protein catalyzes the conversion of ADP to ATP. 
A) The solute moves against the concentration gradient. 
B) The transport protein must cross to the correct side of the membrane before the solute can bind to it. 
C) The transport protein is irreversibly phosphorylated as transport takes place. 
D) The transport protein catalyzes the conversion of ADP to ATP.

Question 11

When physicians perform an organ transplant,they choose a donor whose tissues match those of the recipient as closely as possible.Which of the following cell components are being matched?

Accepted Answer

A) plasma membrane cholesterols 
B) plasma membrane proteins 
C) plasma membrane phospholipids 
D) cell- surface carbohydrates 
A) plasma membrane cholesterols 
B) plasma membrane proteins 
C) plasma membrane phospholipids 
D) cell- surface carbohydrates

Exam 5: The Working Cell

Diffusion does not require the cell to expend ATP.Therefore,diffusion is considered a type of

Which of the following processes can move a solute against its concentration gradient?

White blood cells (WBCs)are more resistant to lysis than red blood cells (RBCs).When looking at a sample of blood for WBCs,what could you do to reduce interference from RBCs?

In a hypotonic solution,an animal cell will

Heating inactivates enzymes by

Which of the following statements regarding enzyme function is false?

Which of the following statements regarding membrane function is false?

The process of a white blood cell engulfing a bacterium is

Small,nonpolar,hydrophobic molecules such as fatty acids

Which of the following is a typical feature of an ATP- driven active transport mechanism?

When physicians perform an organ transplant,they choose a donor whose tissues match those of the recipient as closely as possible.Which of the following cell components are being matched?

Biology: Exploring Life

The Chemical Basis of Life

The Molecules of Cells

A Tour of the Cell

How Cells Harvest Chemical Energy

Photosynthesis: Using Light to Make Food

The Cellular Basis of Reproduction and Inheritance

Patterns of Inheritance

Molecular Biology of the Gene

How Genes Are Controlled

Dna Technology and Genomics

How Populations Evolve

The Origin of Species

Tracing Evolutionary History

Microbial Life: Prokaryotes and Protists

The Evolution of Plant and Fungal Diversity

The Evolution of Invertebrate Diversity

The Evolution of Vertebrate Diversity

Unifying Concepts of Animal Structure and Function

Nutrition and Digestion

Gas Exchange

Circulation

The Immune System

Control of Body Temperature and Water Balance

Hormones and the Endocrine System

Reproduction and Embryonic Development

Nervous Systems

The Senses

How Animals Move

Plant Structure,growth,and Reproduction

Plant Nutrition and Transport

Control Systems in Plants

The Biosphere: an Introduction to Earths Diverse Environments

Behavioral Adaptations to the Environment

Population Ecology

Communities and Ecosystems

Conservation Biology

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