AnswersLincoln Biology A-CRUnit Test

DNA and RNA Structure Answers

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1
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Who first identified DNA?

A
Rosalind Franklin
B
Erwin Chargaff
C
Friedrich Miescher
D
James Watson
2
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What basic unit of heredity is found on segments of DNA and are passed on from parent to offspring?

A
nucleotide
B
gene
C
phosphate molecule
D
deoxyribose sugar
3

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
4

According to Chargaff's rule, base pairing in DNA should resemble which of the following?

A
A = T; C = G
B
A = C; T = G
C
A = G; T = U
D
A = U; C = G
5

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.
6

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
7

Which is one of the primary goals of the Human Genome Project?

A
to cure all diseases that affect humans
B
to sequence the genome of every living individual
C
to identify the 20,000 to 25,000 genes that comprise the human genome
D
to measure the length of human DNA
8

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
9

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
10

Which are segments of DNA that code for specific traits?

A
genes
B
chromosomes
C
proteins
D
codons

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