AnswersHVA 26-27 IM Biology ALab: Identifying Nutrients

Lesson 1: Genetic Code Answers

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1
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Which bases are found in a strand of DNA?

A
thymine, guanine, cytosine, uracil
B
guanine, cytosine, uracil, adenine
C
cytosine, glycine, adenine, thymine
D
adenine, thymine, guanine, cytosine
2
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If the same base pairs are used to code for all organisms, why is there so much variation among organisms?

A
The order of the codons differs between organisms.
B
The order of the codons is the same between organisms.
C
The codons in each organism are the same.
D
The codons in each organism differ.
3

Who is credited with creating the first accurate model of DNA?

A
Rosalind Franklin
B
Friedrich Miescher
C
James Watson and Francis Crick
D
Marshall Nirenberg and Heinrich Matthaei
4

Which best describes the outcome of DNA replication?

A
The new DNA molecule is identical to the original DNA.
B
The new DNA molecule is synthesized from amino acids.
C
The new DNA molecule has a different number of codons.
D
The new DNA molecule is single-stranded.
5

Who first identified DNA?

A
Rosalind Franklin
B
Erwin Chargaff
C
Friedrich Miescher
D
James Watson
8

Which of the following incorrectly matches the term with its location?

A
DNA is found in a chromosome.
B
Chromosomes are found in the nucleus of a cell.
C
Genes are located in a nucleotide.
D
Nitrogen bases are located in the central rungs of a DNA ladder.
9

In 1953, who developed the model that is shown below?

Question illustration
A
James Watson and Francis Crick
B
Marshall Nirenberg and Heinrich Matthaei
C
Rosalind Franklin
D
Erwin Chargaff
11

What is one benefit of mapping the human genome?

A
locating the chromosomal abnormalities that cause disease
B
having the genomes of every living individual on file
C
choosing the gender or intellectual ability of an unborn child
D
cloning the individuals that comprise a nearly extinct tribe
13

What was Marshall Nirenberg and Heinrich Matthaei’s contribution to our current understanding of the genetic code?

A
discovery of codons
B
discovery and extraction of DNA
C
creation of a model of DNA
D
creation of Photo 51
15

In 1953, who developed the model that is shown below?

Question illustration
A
James Watson and Francis Crick
B
Marshall Nirenberg and Heinrich Matthaei
C
Rosalind Franklin
D
Erwin Chargaff
16

Which of the following incorrectly matches the term with its location?

A
DNA is found in a chromosome.
B
Chromosomes are found in the nucleus of a cell.
C
Genes are located in a nucleotide.
D
Nitrogen bases are located in the central rungs of a DNA ladder.
17

Organisms inherit specific traits and characteristics from their parents. Albinism is an inherited disorder that occurs when an organism is unable to produce or distribute melanin. Melanin is a substance in the body that helps determine skin color, hair color, and eye color.Which is the basic unit of heredity that carries the trait of albinism from parent to offspring?

Question illustration
A
base pairs
B
genes
C
proteins
D
codons
18

What is one benefit of mapping the human genome?

A
locating the chromosomal abnormalities that cause disease
B
having the genomes of every living individual on file
C
choosing the gender or intellectual ability of an unborn child
D
cloning the individuals that comprise a nearly extinct tribe
19

Which best describes the outcome of DNA replication?

A
The new DNA molecule is identical to the original DNA.
B
The new DNA molecule is synthesized from amino acids.
C
The new DNA molecule has a different number of codons.
D
The new DNA molecule is single-stranded.
20

Who first identified DNA?

A
Rosalind Franklin
B
Erwin Chargaff
C
Friedrich Miescher
D
James Watson

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