AnswersLPS CR - Biology - ALab: Mouse Genetics (One Trait)

Lab: Mouse Genetics (One Trait) — Cumulative exam Answers

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41
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Which is a scientific question?

A
Can cats learn to sit down on command?
B
Why do black cats bring bad luck?
C
Are spotted cats cuter than solid-colored cats?
D
Why are Persian cats so funny?
42
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A class was performing an experiment to discover the pH values of some common household substances. The results of three groups are shown in the table below.SubstanceGroup 1 pHGroup 2 pHGroup 3 pHLemon juice2.22.22.1Vinegar2.82.88.2Baking soda8.48.58.4Milk of magnesia10.210.310.2Which statement best describes evidence that Group 3’s data are less valid than the data for the other two groups?

A
Group 3’s pH value for lemon juice is lower than the values of the other two groups.
B
Group 3’s pH value for vinegar is much higher than the values of the other two groups.
C
Group 3’s pH value for baking soda does not exactly match the values of the other two groups.
D
Group 3’s pH value for milk of magnesia is different from the value obtained by Group 2.
43

Which of the following could be a nucleotide of DNA?

A
deoxyribose + phosphate group + thymine
B
deoxyribose + phosphate group + uracil
C
ribose + phosphate group + thymine
D
ribose + phosphate group + uracil
44

If the endoplasmic reticulum were removed from the cell, which organelle would not be able to function properly, and why?

A
mitochondria, because they rely on the ER as an energy source
B
ribosomes, because they receive proteins made by the ER
C
Golgi apparatus, because it packages proteins received from the ER
D
cytoplasm, because it relies on the ER for structural support
45

The diagram below shows the energy conversions of the Krebs cycle, which is part of cellular respiration. The U-shaped arrows that show changes for NAD+, FAD, and ADP molecules represent energy conversions. From each glucose molecule, two acetyl-CoA molecules are made for the Krebs cycle.How many energy conversions occur when both acetyl-CoA molecules go through the Krebs cycle?

Question illustration
A
5
B
6
C
10
D
12
46

What is the purpose of controlling the environment when testing a hypothesis?

A
It allows the scientist to determine the effect of the changed variable.
B
It allows samples and organisms to be tested under comfortable conditions.
C
It makes it easier for the scientist to perform the steps of the experiment.
D
It ensures that the scientist is undisturbed while performing the experiment.
47

Which statement correctly distinguishes photosynthesis and respiration?

A
Photosynthesis occurs in animal cells and not plant cells.
B
Cellular respiration occurs in animal cells and not plant cells.
C
Photosynthesis uses chemical energy as energy source, and cell respiration uses light energy.
D
Photosynthesis uses light as energy source, and cell respiration uses chemical energy.
48

Which macromolecule provides a person with the highest amount of energy per mass?

A
lipids
B
carbohydrates
C
nucleic acids
D
proteins
49

Parents that are heterozygous for having freckles (dominant) are crossed. Which correctly describes their offspring?

A
Twenty-five percent have freckles.
B
Twenty-five percent are Ff.
C
Seventy-five percent have freckles.
D
Seventy-five percent are Ff.
50

How are proteins and nucleic acids related?

A
They both provide energy.
B
They both carry genetic information.
C
The structure of proteins is determined by nucleic acids.
D
The subunits of nucleic acids are also the subunits of proteins.

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