Bio 1001 Chapter 13 comprehensive
Questions and Answers with Verified
Solutions
Question 1:
In DNA from any species, the amount of adenine equals the amount of
thymine, and the amount of guanine equals the amount of cytosine.
Which of the following investigators was (were) responsible for this
discovery?
Answer:
Erwin Chargaff
Question 2:
It became apparent to Watson and Crick after completion of their model
that the DNA molecule could carry a vast amount of hereditary
information based on which of the following characteristics?
Answer:
the sequence of bases
Question 3:
Cytosine makes up 42% of the nucleotides in a sample of DNA from an
organism. Approximately what percentage of the nucleotides in this
sample will be thymine?
Answer:
8%
, Question 4:
In a DNA double helix an adenine of one strand always pairs with a(n)
_____ of the complementary strand, and a guanine of one strand always
pairs with a(n) _____ of the complementary strand.
Answer:
thymine ... cytosine
Question 5:
In the accompanying image, a nucleotide is indicated by the letter _____.
Answer:
B
Question 6:
Which of these is a difference between a DNA and an RNA molecule?
Answer:
DNA is usually double-stranded, whereas RNA is usually single-stranded.
Question 7:
This is an image of a(n) _____.
Questions and Answers with Verified
Solutions
Question 1:
In DNA from any species, the amount of adenine equals the amount of
thymine, and the amount of guanine equals the amount of cytosine.
Which of the following investigators was (were) responsible for this
discovery?
Answer:
Erwin Chargaff
Question 2:
It became apparent to Watson and Crick after completion of their model
that the DNA molecule could carry a vast amount of hereditary
information based on which of the following characteristics?
Answer:
the sequence of bases
Question 3:
Cytosine makes up 42% of the nucleotides in a sample of DNA from an
organism. Approximately what percentage of the nucleotides in this
sample will be thymine?
Answer:
8%
, Question 4:
In a DNA double helix an adenine of one strand always pairs with a(n)
_____ of the complementary strand, and a guanine of one strand always
pairs with a(n) _____ of the complementary strand.
Answer:
thymine ... cytosine
Question 5:
In the accompanying image, a nucleotide is indicated by the letter _____.
Answer:
B
Question 6:
Which of these is a difference between a DNA and an RNA molecule?
Answer:
DNA is usually double-stranded, whereas RNA is usually single-stranded.
Question 7:
This is an image of a(n) _____.
