AnswersLincoln Biology A-CRUnit Test

Unit Test — Unit test Answers

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1
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Which best describes the cell theory?

A
Scientists know all there is to know about cells, so the cell theory will not change.
B
As technological advancements are made, the cell theory may change.
C
A theory, once formulated, cannot be changed.
D
The development of a synthetic cell has caused the cell theory to change.
2
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A magnifying glass is an example of which type of microscope?

A
electron microscope
B
scanning microscope
C
compound light microscope
D
simple microscope
3

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

A
Golgi apparatus
B
nucleus
C
endoplasmic reticulum
D
mitochondrion
4

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

A
cell membrane
B
Golgi apparatus
C
ribosomes
D
nucleus
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

In the study of cancer, researchers have used different types of cells, different environmental conditions, and different experimental designs. But, all researchers have arrived at the same conclusion. What does this say about the conclusion?

A
It is well supported.
B
It is weakly supported.
C
It is inconclusive.
D
It is refuted.
7

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
8

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.
9

A poison placed on the tips of darts by natives of the Amazon rainforest paralyzes prey such as small mammals. Which of the prey's cells are most likely affected by the poison?

A
muscle cells
B
epithelial cells
C
red blood cells
D
white blood cells
10

How would the contractile vacuole of a freshwater amoeba respond if the organism was placed in seawater?

A
with more contractions
B
with fewer contractions
C
the contractions would suddenly cease
D
with the same frequency of contractions
11

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
12

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
13

Consider this animal cell.Which organelles are labeled G?

Question illustration
A
centrioles
B
lysosomes
C
ribosomes
D
mitochondria
14

Which specialized cell type would be found lining the trachea, the part of the body that brings air to the lungs?

A
blood
B
epithelial cells
C
neuron
D
muscle cells
15

Which specialized cells are responsible for transmitting messages throughout the body?

A
neurons
B
epithelial cells
C
blood cells
D
muscle cells
16

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.
17

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

A
Virchow
B
van Leeuwenhoek
C
Hooke
D
Schleiden and Schwann
18

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.
19

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
20

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.

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