Question 1

Skin cells are fastened into strong sheets by

Accepted Answer

A) basal bodies. 
B) anchoring junctions. 
C) tight junctions. 
D) communicating junctions. 
A) basal bodies. 
B) anchoring junctions. 
C) tight junctions. 
D) communicating junctions.

Question 2

According to this figure, which of the following are large enough to see in the light microscope?

Accepted Answer

A) atoms 
B) proteins 
C) viruses 
D) mitochondria 
A) atoms 
B) proteins 
C) viruses 
D) mitochondria

Question 3

The function of mitochondria is

Accepted Answer

A) cellular respiration. 
B) lipid synthesis. 
C) photosynthesis. 
D) intracellular digestion. 
A) cellular respiration. 
B) lipid synthesis. 
C) photosynthesis. 
D) intracellular digestion.

Question 4

Which of the following structures is exclusively associated with prokaryotic cells?

Accepted Answer

A) membrane-bound nucleus 
B) nucleoid 
C) chromosome 
D) ribosomes 
A) membrane-bound nucleus 
B) nucleoid 
C) chromosome 
D) ribosomes

Question 5

A basal body is

Accepted Answer

A) composed of nine microtubule triplets surrounding a central pair of microtubules. 
B) similar in structure to centrioles. 
C) composed of nine microtubule doublets surrounding a central pair of microtubules. 
D) identical in structure to cilia. 
A) composed of nine microtubule triplets surrounding a central pair of microtubules. 
B) similar in structure to centrioles. 
C) composed of nine microtubule doublets surrounding a central pair of microtubules. 
D) identical in structure to cilia.

Question 6

Which of the following statements regarding the endomembrane system is false?

Accepted Answer

A) The endomembrane system is involved in the synthesis, storage, and export of important molecules. 
B) The endomembrane system includes the rough and smooth endoplasmic reticulum. 
C) The endomembrane system includes the nuclear envelope. 
D) The endomembrane system is a system of interrelated membranes that are all physically connected. 
A) The endomembrane system is involved in the synthesis, storage, and export of important molecules. 
B) The endomembrane system includes the rough and smooth endoplasmic reticulum. 
C) The endomembrane system includes the nuclear envelope. 
D) The endomembrane system is a system of interrelated membranes that are all physically connected.

Question 7

________ cells lack a membrane-enclosed nucleus.

Accepted Answer

A) Plant 
B) Prokaryotic 
C) Eukaryotic 
D) Fungal 
A) Plant 
B) Prokaryotic 
C) Eukaryotic 
D) Fungal

Question 8

After reading the paragraph below, answer the questions that follow.
The skin is the body's largest organ. It's made up of many different types of cells. Oils, produced by the sebaceous glands, prevent the skin from drying and splitting. The protein melanin, produced by melanocytes in the epidermis, protects the skin from the harmful effects of ultraviolet radiation. Sweat, released through ducts to the skin surface, helps to cool the body. The types of cells that produce these compounds have different numbers of specific organelles, depending on their function.
-The oil from the sebaceous glands is produced by which of the following cell organelles?

Accepted Answer

A) ribosomes 
B) rough endoplasmic reticulum 
C) cell membrane 
D) smooth endoplasmic reticulum 
A) ribosomes 
B) rough endoplasmic reticulum 
C) cell membrane 
D) smooth endoplasmic reticulum

Question 9

Unlike animal cells, plant cells have ________ and ________. Unlike plant cells, animal cells have ________.

Accepted Answer

A) chloroplasts; cell walls; centrioles 
B) centrioles; chloroplasts; cell walls 
C) chloroplasts; cell walls; a nucleus 
D) centrioles; cell walls; large central vacuoles 
A) chloroplasts; cell walls; centrioles 
B) centrioles; chloroplasts; cell walls 
C) chloroplasts; cell walls; a nucleus 
D) centrioles; cell walls; large central vacuoles

Question 10

After reading the paragraph below, answer the questions that follow.
Studies of the endomembrane system often involve the use of a protein that can emit a green fluorescence (glow). A researcher wants to make a video of cell behavior, so she initially tags the outer nuclear envelope of a cell with the fluorescent tag and records for several hours. Later, she sees that the tag is part of a secretory vesicle.
-The fluorescent tag likely did not become incorporated into which of the following organelles?

Accepted Answer

A) lysosome 
B) Golgi 
C) microtubules 
D) rough ER 
A) lysosome 
B) Golgi 
C) microtubules 
D) rough ER

Question 11

The endosymbiosis hypothesis proposes that

Accepted Answer

A) two separate cells worked cooperatively and one benefited from the other. 
B) a small cell lived inside a larger cell to the benefit of both cells. 
C) a large cell engulfed and digested a smaller cell, exposing its enzymes for use by the larger cell. 
D) two cells merged into one cell, improving the enzyme function of the new cell. 
A) two separate cells worked cooperatively and one benefited from the other. 
B) a small cell lived inside a larger cell to the benefit of both cells. 
C) a large cell engulfed and digested a smaller cell, exposing its enzymes for use by the larger cell. 
D) two cells merged into one cell, improving the enzyme function of the new cell.

Question 12

A manufacturing company dumps its wastes into a nearby pond. One of the wastes is found to paralyze the contractile vacuoles of certain protists. A biologist looking at individual samples of these organisms taken from the pond would find that they

Accepted Answer

A) have lost water and shrunk. 
B) have gained water and burst. 
C) have died of malnutrition. 
D) have died because wastes have built up in the cytoplasm. 
A) have lost water and shrunk. 
B) have gained water and burst. 
C) have died of malnutrition. 
D) have died because wastes have built up in the cytoplasm.

Question 13

Much of the intracellular structure of a eukaryote cell is involved in protein synthesis. The figure shows the amounts of protein in cells at different parts of the cell cycle between two cell divisions. G₁ is a stage just after the cell has divided, and G₂ is the stage just before the cell divides again. S is a stage when the cell is synthesizing material such as DNA, mitochondria, and other organelles.
-Most of the protein measured in the cells was likely synthesized by

Accepted Answer

A) mitochondria. 
B) nucleolus. 
C) smooth endoplasmic reticulum. 
D) ribosomes. 
A) mitochondria. 
B) nucleolus. 
C) smooth endoplasmic reticulum. 
D) ribosomes.

Question 14

Resolution is the

Accepted Answer

A) ability of an optical instrument to show two close objects as separate. 
B) size of an image. 
C) ability of an optical instrument to magnify an image. 
D) distance between the lenses of a microscope. 
A) ability of an optical instrument to show two close objects as separate. 
B) size of an image. 
C) ability of an optical instrument to magnify an image. 
D) distance between the lenses of a microscope.

Question 15

Which of the following cell structures are associated with the breakdown of harmful substances?

Accepted Answer

A) chloroplasts 
B) mitochondria 
C) peroxisomes 
D) centrioles 
A) chloroplasts 
B) mitochondria 
C) peroxisomes 
D) centrioles

Question 16

Secretory proteins are

Accepted Answer

A) produced by ribosomes on the smooth endoplasmic reticulum. 
B) chemically modified in the nucleus. 
C) produced by the cell for internal use. 
D) released from the cell through the plasma membrane. 
A) produced by ribosomes on the smooth endoplasmic reticulum. 
B) chemically modified in the nucleus. 
C) produced by the cell for internal use. 
D) released from the cell through the plasma membrane.

Question 17

The function of chloroplasts is

Accepted Answer

A) cellular respiration. 
B) lipid synthesis. 
C) photosynthesis. 
D) intracellular digestion. 
A) cellular respiration. 
B) lipid synthesis. 
C) photosynthesis. 
D) intracellular digestion.

Question 18

A scanning electron microscope is used to study ________, whereas a transmission electron microscope is used to study ________.

Accepted Answer

A) live cells; dead cells 
B) cell surfaces; internal cell structures 
C) dead cells; live cells 
D) internal cell structures; cell surfaces 
A) live cells; dead cells 
B) cell surfaces; internal cell structures 
C) dead cells; live cells 
D) internal cell structures; cell surfaces

Question 19

The endomembrane system includes all of the following organelles except the

Accepted Answer

A) plasma membrane. 
B) endoplasmic reticulum. 
C) peroxisome. 
D) Golgi apparatus. 
A) plasma membrane. 
B) endoplasmic reticulum. 
C) peroxisome. 
D) Golgi apparatus.

Question 20

Which of the following statements regarding cells is false?

Accepted Answer

A) All cells are enclosed in a membrane that maintains internal conditions different from the surroundings. 
B) All cells have a cell wall. 
C) All cells can interconvert forms of energy. 
D) All cells have DNA as their genetic material. 
A) All cells are enclosed in a membrane that maintains internal conditions different from the surroundings. 
B) All cells have a cell wall. 
C) All cells can interconvert forms of energy. 
D) All cells have DNA as their genetic material.

Exam 4: A Tour of the Cell

Skin cells are fastened into strong sheets by

According to this figure, which of the following are large enough to see in the light microscope?

The function of mitochondria is

Which of the following structures is exclusively associated with prokaryotic cells?

A basal body is

Which of the following statements regarding the endomembrane system is false?

________ cells lack a membrane-enclosed nucleus.

Unlike animal cells, plant cells have ________ and ________. Unlike plant cells, animal cells have ________.

The endosymbiosis hypothesis proposes that

A manufacturing company dumps its wastes into a nearby pond. One of the wastes is found to paralyze the contractile vacuoles of certain protists. A biologist looking at individual samples of these organisms taken from the pond would find that they

Resolution is the

Which of the following cell structures are associated with the breakdown of harmful substances?

Secretory proteins are

The function of chloroplasts is

A scanning electron microscope is used to study ________, whereas a transmission electron microscope is used to study ________.

The endomembrane system includes all of the following organelles except the

Which of the following statements regarding cells is false?

Biology: Exploring Life

The Chemical Basis of Life

The Molecules of Cells

The Working 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

Filters

Unlike animal cells, plant cells have and . Unlike plant cells, animal cells have .

A scanning electron microscope is used to study , whereas a transmission electron microscope is used to study .