Cumulative Exam — Cumulative exam Answers

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Which of the following is a method that geneticists use to determine if an individual has chromosome abnormalities?

A
karyotype of the individual’s chromosomes
B
DNA fingerprinting of the individual
C
X-ray of the individual
D
examination of the meiosis process of the chromosomes
3

Which is the most efficient way to avoid DNA mutations from UV radiation?

A
Avoid getting X-rays at the doctor’s office.
B
Avoid protective shields during X-rays.
C
Avoid UV radiation by wearing sunscreen.
D
Avoid UV radiation by using a tanning bed.
5

Which statement best describes how Watson and Crick's model used other scientists' work to create a model of DNA?

A
They used Chargaff's rule to determine that it contains ribose sugar.
B
They used Franklin's photo to determine that DNA was a double helix.
C
They used Levene's work to determine the number of base pairs in each strand.
D
They used Nirenberg and Matthei's studies to determine that DNA is made of nucleotides.
6

Which is an advantage of producing genetically engineered crops that have pest-resistant genes?

A
bioaccumulation of pesticides
B
allows farmers to grow any crop they want
C
reduces the use of pesticides for certain insects
D
gene transfer to nontarget species
8

Why are algae and ferns both green?

A
They each contain chlorophyll that absorbs violet-blue light and reflects green light.
B
They each contain chlorophyll that absorbs green light and reflects violet-blue light.
C
Algae contain chlorophyll, and ferns contain ferredoxin that absorbs violet-blue light and reflects green light.
D
Ferns contain chlorophyll, and algae contain ferredoxin that absorbs green light and reflects violet-blue light.
10

Unsaturated and saturated lipids exhibit different characteristics based on their structures. Which characteristic is unique to saturated fats?

A
forms covalent, carbon-to-carbon bonds
B
is a liquid at room temperature
C
contains the maximum number of hydrogen atoms
D
consists of fatty acids and a carboxyl group
11

Some theories are developed from repeated testing of a single hypothesis. Cell theory, germ theory, and the theory of evolution all have developed from the testing of multiple related hypotheses. Which statement best explains why some theories develop this way?

A
A hypothesis tests many variables at once, which can lead to new hypotheses.
B
Multiple related hypotheses will become theories before a single hypothesis does.
C
Each scientist has used different wording when developing his or her hypothesis.
D
Each experiment reveals a different piece of information that is needed to develop the theory.
12

If a scientist wanted to follow Mendel’s experiment with a different kind of plant, which type of plant would she examine?

A
A plant that cannot self-pollinate.
B
A plant that has only recessive alleles.
C
A plant that has three alleles for a trait.
D
A plant that has only two alleles for a trait.
14

During which stage of cellular respiration is glucose broken down into two molecules of pyruvic acid?

A
electron transport chain
B
glycolysis
C
Krebs cycle
D
acetyl CoA formation
15

During which process is ethanol produced?

A
lactic acid fermentation
B
alcohol fermentation
C
citric acid cycle
D
electron transport chain
16

What is the next step in the process after a substrate enters the active site of an enzyme?

A
The chemical reaction occurs.
B
New substances called products are formed.
C
The enzyme and the substrate bind to form the enzyme-substrate complex.
D
The enzyme and the products bind to form the enzyme-products complex.
17

Consider the diagram.Which process is represented?

Question illustration
A
deletion
B
nondisjunction
C
translocation
D
insertion
20

Which statement best describes the relationship between proteins and nucleic acids?

A
Proteins read the instructions that are contained in nucleic acids.
B
Nucleic acids synthesize the amino acids for protein construction.
C
Nucleic acids provide the blueprint for the construction of proteins.
D
Proteins are composed of nucleic acids.

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