AnswersAL-Biology AUnit Test

Unit Test — Unit test Answers

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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
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

A scientist is comparing the outer layer of an onion cell to the outer layer of a human skin cell. What is unique about the outer layer of the onion cell compared to the skin cell?

A
It contains proteins.
B
It contains cellulose.
C
It contains carbohydrates.
D
It is selectively permeable.
4

Why might damage to the nervous tissue in the spinal cord lead to paralysis?

A
Damage results in the loss of signals to muscles that produce movement.
B
Damage results in the inability of the body to differentiate between voluntary and involuntary movement.
C
Damage results in the inability of the body to produce connective tissue to support movement.
D
Damage results in the decreased production of actin and myosin for contraction.
5

A sample of tissue has been observed to be tightly packed and regenerative. What type of tissue is the sample?

A
epithelial
B
connective
C
nervous
D
muscle
6

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
7

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.
8

Consider this animal cell.Which organelles are labeled G?

Question illustration
A
centrioles
B
lysosomes
C
ribosomes
D
mitochondria
9

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

A
cell membrane
B
Golgi apparatus
C
ribosomes
D
nucleus
10

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.
11

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.
12

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.
13

The iris in the human eye contracts and expands, controlling the amount of light that reaches the retina. What types of muscle control this?

A
skeletal and voluntary
B
smooth and cardiac
C
skeletal and smooth
D
smooth and involuntary
14

A patient with osteoporosis (reduced bone mass) may have a history of health issues. One issue could be

A
not enough skin exposure to the sun to make Vitamin D.
B
weak ligaments.
C
an increase in the absorption of calcium in the digestive system.
D
weak tendons.
15

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

A
Virchow
B
van Leeuwenhoek
C
Hooke
D
Schleiden and Schwann
16

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
17

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

A
Golgi apparatus
B
nucleus
C
endoplasmic reticulum
D
mitochondrion
18

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.
19

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
20

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

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