AnswersFirst Semester BiologyAnimal and Plant Cells

Animal and Plant Cells — Unit test Answers

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Which statement is one component of the cell theory?

A
All living and nonliving things consist of one or more cells.
B
Cells and living organisms are spontaneously created.
C
Cells are the most complex unit of structure and function in living things.
D
A cell is the basic unit of structure and function of all organisms.
2
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A scientist discovers a cell that has chloroplasts, cytoplasm, DNA, and a cell membrane. Which statement best describes how the cell could be classified?

A
The cell is prokaryotic because it has DNA.
B
The cell is prokaryotic because it has cytoplasm.
C
The cell is eukaryotic because it has a cell membrane.
D
The cell is eukaryotic because it has chloroplasts.
3

The table lists some organelles and functions. Only one pair is correctly matched.Functions of OrganellesOrganelleFunctionChloroplastStores water and waste materialsCell wallSupports cell membrane, maintains cell shape, and protects cellCell membraneBreaks down waste materials and debrisVacuoleProduces proteins for the cellWhich organelle in the table is correctly matched with its function?

A
chloroplast
B
cell wall
C
cell membrane
D
vacuole
4

Who first recognized the cell as the universal unit of life?

A
Virchow
B
van Leeuwenhoek
C
Hooke
D
Schleiden and Schwann
5

The endosymbiotic theory provides an explanation for the origin of chloroplasts. Which trait of chloroplasts supports this explanation?

A
Chloroplasts do not reproduce.
B
Chloroplasts rely on proteins that are made by the cell.
C
Chloroplasts are larger than prokaryotic cells.
D
Chloroplasts have their own DNA.
6

The role of the cell membrane is most like the job of which person?

A
a firefighter who evacuates people from a burning building
B
a police officer who allows select people to enter and leave a crime scene
C
a bus driver who drives the express route from the suburb to downtown
D
a teacher who keeps students in the classroom during an exam
7

Which organelle makes the proteins that are needed by the cell?

A
cell membrane
B
Golgi apparatus
C
ribosomes
D
nucleus
8

Suppose that a patient is diagnosed with a new disease caused by the buildup of waste material in the body’s cells. Which organelle is most likely malfunctioning in the patient’s cells?

A
Golgi apparatus
B
lysosome
C
ribosome
D
endoplasmic reticulum
9

Consider this animal cell.Which organelles are labeled D, and what is one feature that distinguishes them from the other labeled organelles?

Question illustration
A
chloroplasts; the only organelles that produce sugars from sunlight
B
ribosomes; only found in animal and bacterial cells
C
centrioles; found in animal cells but not plant cells
D
mitochondria; the only energy-generating structures found in cells
10

Which term describes an extensive network of tubes, sacs, and vesicles throughout a cell that provides transport as its main function?

A
cell membrane
B
endoplasmic reticulum
C
centriole
D
cell wall
11

A chemical has been found to harm the same components in both prokaryotic and eukaryotic cells. Which components are those?

A
DNA, cell membrane, cytoplasm, and ribosomes
B
DNA, cell membrane, ribosomes, and membrane-bound organelles
C
DNA, cytoplasm, ribosomes, and nucleus
D
DNA, cell membrane, cytoplasm, and membrane-bound organelles
12

A student constructs a Venn diagram to compare the organelles in plant and animal cells.Venn Diagram of Plant and Animal CellsWhich organelle should be listed under “Plant Only” in the diagram?

Question illustration
A
centriole
B
vacuole
C
lysosome
D
chloroplast
13

Which organelle breaks down sugar molecules that supply energy to the cell?

A
Golgi apparatus
B
nucleus
C
endoplasmic reticulum
D
mitochondrion
14

Consider this animal cell.Which organelles are labeled G?

Question illustration
A
centrioles
B
lysosomes
C
ribosomes
D
mitochondria
15

Which best defines homeostasis?

A
modifying the external environment
B
maintaining a stable internal environment
C
controlling what enters and exits the cell
D
movement of materials into the cell
16

How is mitochondrial DNA (mtDNA) typing used in forensic science?

A
A suspect’s mtDNA sample is matched to an unknown sample of nuclear DNA that was found at a crime scene.
B
A suspect’s mtDNA sample is matched to an unknown sample of mtDNA that was found at a crime scene.
C
A suspect’s nuclear DNA sample is matched to an unknown sample of nuclear DNA that was found at a crime scene.
D
A suspect’s nuclear DNA sample is matched to an unknown sample of mtDNA that was found at a crime scene.
17

A magnifying glass is an example of which type of microscope?

A
electron microscope
B
scanning microscope
C
compound light microscope
D
simple microscope
18

Which structure is found in the cytoplasm of a prokaryotic cell, but is not found in the cytoplasm of a eukaryotic cell?

A
DNA
B
ribosomes
C
nucleus
D
mitochondria
19

The data in the table were recorded during an investigation in which a paramecium was placed in a hypertonic salt solution. If this data is shown in a bar graph, which description accurately represents the bars?

Question illustration
A
The graph has five bars of equal height.
B
The bars range from tallest for very high concentration to shortest for very low concentration.
C
The bar for very low concentration is twice the height of the bar for medium concentration.
D
The bar for very high concentration is five times the height of the bar for very low concentration.
20

Which is a structure that directs the cell's activities?

A
nucleus
B
Golgi apparatus
C
ribosome
D
mitochondrion

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