Answers26-27 RPA- Biology 12 CRCellular Respiration

Cellular Respiration — Unit test Answers

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21
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Three cells undergo meiosis. How many haploid cells are produced?

A
3
B
6
C
9
D
12
22
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What role does cellular respiration play in the water cycle?

A
It removes H2O from the atmosphere during glycolysis.
B
It removes H2O from the atmosphere during acetyl CoA formation.
C
It releases H2O to the atmosphere during the citric acid cycle.
D
It releases H2O to the atmosphere during electron transport.
23

Scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. What is one benefit of this procedure?

A
Patients do not receive harmful or ineffective medication.
B
The cultured cells are not in their normal environment.
C
Doctors know how to treat all types of cancer.
D
One tissue culture can be used for all cancer patients.
24

Which process occurs within the mitochondria?

A
lactic acid fermentation
B
alcohol fermentation
C
glycolysis
D
Krebs cycle
25

Which statement best describes cancer cells?

A
They grow as a single layer of cells.
B
They cease to reproduce after 20–50 mitotic divisions.
C
They reproduce only when needed to replace missing cells.
D
They are not regulated by contact inhibition.
26

Which are replicated during interphase?

A
sister chromatids
B
chromosomes
C
centromeres
D
nuclei
27

Which discovery did Gregor Mendel make?

A
Traits are inherited independently of each other.
B
Traits are inherited as a tetrad.
C
Traits are inherited as homologous pairs.
D
Traits are inherited as a set, from one parent.
28

Which is the main light-absorbing pigment for photosynthesis?

A
carotene
B
chlorophyll
C
hemoglobin
D
anthocyanin
29

Which of these statements is true about autotrophs, but not heterotrophs?

A
They use sugar and oxygen to make carbon dioxide and water.
B
They use chlorophyll and oxygen to make carbon dioxide and water.
C
They use sunlight, water, and carbon dioxide to make sugars.
D
They use sunlight, water, and oxygen to make chlorophyll.
30

The Venn diagram compares aerobic respiration and anaerobic respiration.Which statement could be categorized only in the anaerobic section of the Venn diagram?

Question illustration
A
is performed by eukaryotes
B
has commercial uses
C
regenerates NADH
D
occurs in the mitochondria
31

Which statement summarizes a change that occurs during photosynthesis?

A
It converts visible light to high-energy gamma rays.
B
It converts carbon to oxygen.
C
It converts light energy to chemical energy.
D
It converts energy to mass.
32

Which best describes meiosis?

A
It produces cells that are identical to the original cell.
B
It is responsible for the replacement of damaged skin cells.
C
It is responsible for growth of the organism.
D
It produces male and female sex cells.
33

In which phase of mitosis are chromosomes first seen as a result of chromatin coiling?

A
prophase
B
anaphase
C
metaphase
D
telophase
34

Which process connects glycolysis and the citric acid cycle?

A
lactic acid formation
B
acetyl CoA formation
C
electron transport
D
Krebs cycle
35

How does interphase prepare cells for mitosis?

A
rest prior to cell division
B
growth of cell and replication of DNA
C
dissolution of nucleus and cell membrane
D
division of cytoplasm
36

Which correctly describes crossing over?

A
the process whereby non-sister chromatids exchange genetic material
B
the process whereby homologous chromosomes are pulled to opposite poles of the cell
C
the process whereby sister chromatids are pulled to opposite poles of the cell
D
the process whereby homologous chromosome pairs align randomly along the metaphase plate
37

Meiosis occurs in a series of different phases and creates genetically unique reproductive cells. Which process helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II?

A
fertilization
B
independent assortment
C
crossing over
D
chromosome replication
38

If the number of photosynthetic organisms on Earth decreased drastically, which would happen as a result?

A
Less water would be available on Earth’s surface.
B
Less solar energy would reach Earth’s atmosphere.
C
More oxygen gas would be found in Earth’s atmosphere.
D
More carbon dioxide gas would be found in Earth’s atmosphere.
39

If a runner is doing vigorous exercise, which results from the anaerobic cellular process?

A
accumulation of lactic acid
B
accumulation of oxygen
C
depletion of ethanol
D
depletion of carbon dioxide
40

It is crucial that the process of mitosis is error free. This is because otherwise healthy cells can

A
grow into giant super cells.
B
undergo meiosis.
C
become cancer cells.
D
produce two identical cells.

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