Question 1

Both animal and plant cells contain these energy-processing organelles.

Accepted Answer

A)   Golgi apparatus
B)   lysosomes
C)   ribosomes
D)   chloroplasts
E)   mitochondria

Question 2

The cytoskeleton is composed of _______ fibers.

Accepted Answer

A)   lipid
B)   protein
C)   fat
D)   carbohydrate
E)   metal

Question 3

Which of the following types of transport are most closely related in terms of the energy requirements for moving material across a membrane?

Accepted Answer

A)   simple diffusion and facilitated diffusion
B)   active transport and facilitated transport
C)   simple diffusion and active transport
D)   Simple diffusion,facilitated diffusion,and active transport all have similar energy requirements.
E)   Methods of moving material across a membrane do not require energy.

Question 4

Which of the following is NOT a cytoskeletal fiber in eukaryotic cells?

Accepted Answer

A)   macrotubules
B)   intermediate filaments
C)   microfilaments
D)   microtubules
E)   lysosomes

Question 5

The rough ER makes _________,whereas the smooth ER makes _________.

Accepted Answer

A)   sugars;proteins
B)   proteins;sugars
C)   sugars;lipids
D)   lipids;sugars
E)   proteins;lipids

Question 6

Penicillin is isolated from

Accepted Answer

A)   Staphylococcus.
B)   protists.
C)   mold.
D)   bacteria.
E)   yeast.

Question 7

Chloroplasts are found in

Accepted Answer

A)   bacterial cells.
B)   animal cells.
C)   plant cells.
D)   animal and plant cells.
E)   all cells.

Question 8

Which of the following statements best explains why bacteria are considered living organisms?

Accepted Answer

A)   They can cause disease.
B)   They are made up of biological macromolecules.
C)   They move around.
D)   They are made of cells.
E)   They contain organelles.

Question 9

The hydrophilic head of a phospholipid is composed of

Accepted Answer

A)   a cholesterol group,a phosphate group,and a glycerol molecule.
B)   a choline group,a phosphate group,and a glycerol molecule.
C)   a cholesterol group,a phosphate group,and a glycine molecule.
D)   a choline group,a phosphorous atom,and a glycerol molecule.
E)   a choline group,a phosphorous atom,and a glycine molecule.

Question 10

Where are proteins produced in prokaryotic cells?

Accepted Answer

A)   rough ER
B)   cell membrane
C)   cell wall
D)   ribosomes
E)   smooth ER

Question 11

Sugars are large,hydrophilic molecules that are important energy sources for cells.How can they enter cells from an environment with a very high concentration of sugar?

Accepted Answer

A)   by simple diffusion
B)   by osmosis
C)   by facilitated diffusion
D)   by active transport
E)   by using ribosomes

Question 12

What were Fleming's initial observations about organisms on a Petri dish that led him to discover penicillin?

Accepted Answer

A)   A zone of clearing formed around bacterial colonies.
B)   Bacterial mycelium inhibited mold growth.
C)   Fungal colonies grew around bacterial colonies.
D)   Bacteria inhibited the growth of mold.
E)   A mold inhibited the growth of bacterial colonies.

Question 13

Which of the following combinations INCORRECTLY matches an organelle with its function?

Accepted Answer

A)   lysosome: internal support;cell and organelle movement
B)   mitochondrion: conversion of food to usable energy
C)   Golgi apparatus: protein processing and packaging
D)   chloroplast: conversion of sunlight energy to usable cellular energy
E)   endoplasmic reticulum: site of protein and lipid production

Question 14

Many foods-for example,bacon and salt cod-are preserved with high concentrations of salt.How can high concentrations of salt inhibit the growth of bacteria?

Accepted Answer

A)   High salt is hypotonic and causes the bacteria to swell and burst because water rushes into the cell.
B)   High salt is hypotonic and causes the bacteria to shrink because water leaves the bacterial cell.
C)   High salt is hypertonic and causes the bacteria to shrink because water leaves the bacterial cell.
D)   High salt is hypertonic and causes the bacteria to swell and burst because water rushes into the cell.
E)   High salt is hypertonic and causes the bacteria to shrink because salt enters the bacterial cell.

Question 15

The process of molecules moving from a high concentration to a lower concentration in a solution without an energy input is termed

Accepted Answer

A)   active transport.
B)   active diffusion.
C)   facilitated diffusion.
D)   simple diffusion.
E)   osmosis.

Question 16

Water crosses a semipermeable membrane to dilute a solute that is unable to cross the membrane.What is this process called?

Accepted Answer

A)   diffusion
B)   facilitated transport
C)   osmosis
D)   homeostasis
E)   feedback regulation

Question 17

All of the following are true of the cytoskeleton EXCEPT

Accepted Answer

A)   it is made of protein.
B)   it serves as cell support.
C)   it aids in cell movement.
D)   it aids in movement of cell organelles.
E)   it is found only in animal cells.

Question 18

The ______ provides support and a pathway for movement of structures within a cell.

Accepted Answer

A)   endoplasmic reticulum
B)   cytoplasm
C)   nucleus
D)   cytoskeleton
E)   Golgi apparatus

Question 19

Which of the following accurately describes why specific material uses a protein to cross the membrane?

Accepted Answer

A)   The hydrophobic core of a membrane will only allow hydrophobic (i.e. ,non-polar) substances to cross without a membrane protein.
B)   The hydrophilic core of a membrane will only allow hydrophilic (i.e. ,polar) substance to cross without a membrane protein.
C)   The membrane will allow any substance to cross it as long as it moves from a high concentration to low.
D)   The membrane will allow any substance to cross it if the concentration of solute is high enough on one side of the membrane.
E)   Material can only cross the membrane via a protein.

Question 20

Bacterial cell walls are made rigid by the presence of

Accepted Answer

A)   phosphates.
B)   lipids.
C)   peptidoglycan.
D)   cholesterol.
E)   glycerol.

Exam 3: Cell Structure and Function

What were Fleming's initial observations about organisms on a Petri dish that led him to discover penicillin?

Correct AnswerverifiedShow Answer

Bacterial cell walls are made rigid by the presence of

Correct AnswerverifiedShow Answer

The hydrophilic head of a phospholipid is composed of

Correct AnswerverifiedShow Answer

Penicillin is isolated from

Correct AnswerverifiedShow Answer

Which of the following statements best explains why bacteria are considered living organisms?

Correct AnswerverifiedShow Answer

Sugars are large,hydrophilic molecules that are important energy sources for cells.How can they enter cells from an environment with a very high concentration of sugar?

Correct AnswerverifiedShow Answer

Which of the following accurately describes why specific material uses a protein to cross the membrane?

Correct AnswerverifiedShow Answer

The rough ER makes _________,whereas the smooth ER makes _________.

Correct AnswerverifiedShow Answer

All of the following are true of the cytoskeleton EXCEPT

Correct AnswerverifiedShow Answer

Chloroplasts are found in

Correct AnswerverifiedShow Answer

Water crosses a semipermeable membrane to dilute a solute that is unable to cross the membrane.What is this process called?

Correct AnswerverifiedShow Answer

Many foods-for example,bacon and salt cod-are preserved with high concentrations of salt.How can high concentrations of salt inhibit the growth of bacteria?

Correct AnswerverifiedShow Answer

The process of molecules moving from a high concentration to a lower concentration in a solution without an energy input is termed

Correct AnswerverifiedShow Answer

The ______ provides support and a pathway for movement of structures within a cell.

Correct AnswerverifiedShow Answer

Both animal and plant cells contain these energy-processing organelles.

Correct AnswerverifiedShow Answer

The cytoskeleton is composed of _______ fibers.

Correct AnswerverifiedShow Answer

Which of the following is NOT a cytoskeletal fiber in eukaryotic cells?

Correct AnswerverifiedShow Answer

Which of the following types of transport are most closely related in terms of the energy requirements for moving material across a membrane?

Correct AnswerverifiedShow Answer

Where are proteins produced in prokaryotic cells?

Correct AnswerverifiedShow Answer

Which of the following combinations INCORRECTLY matches an organelle with its function?

Correct AnswerverifiedShow Answer

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The rough ER makes _,whereas the smooth ER makes _.

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