Identify components of DNA, and describe how information for specifying the traits of an organism is carried in the DNA.
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Q 1/13
Score 0
Differences in traits such as hair texture are determined by differences in —
30
the sequence of nucleotides in DNA
the location of sugar groups in DNA
the number of nitrogenous bases in DNA
the molecules attached to the phosphate in DNA
Q 2/13
Score 0
A student used poster board to construct this model of a section of DNA. Which statement describes this model of DNA?
30
The model is inaccurate because the base pairs are incorrect
The model is accurate because it contains correctly paired bases
The model is accurate because it shows each base splitting to form a double helix
The model is inaccurate because some typical bases in DNA are missing
13 questions
Q.
Differences in traits such as hair texture are determined by differences in —
1
30 sec
B.6.A: DNA Components
Q.
A student used poster board to construct this model of a section of DNA. Which statement describes this model of DNA?
2
30 sec
B.6.A: DNA Components
Q.
Nitrogenous bases are located on both strands of the DNA double helix. What is the significance of the nitrogenous bases?
3
30 sec
B.6.A: DNA Components
Q.
Each strand of a DNA molecule contains nitrogenous bases that pair with other nitrogenous bases in very specific ways. A diagram of a section of DNA is shown. Which DNA strand is complementary to the one shown above?
4
30 sec
B.6.A: DNA Components
Q.
A segment of DNA is represented in the illustration. How is information for a specific protein carried on the DNA molecule?
5
30 sec
B.6.A: DNA Components
Q.
A student builds a model of a DNA strand. Which of these models of a DNA strand shows bases that are complementary to the ones on the student’s DNA model?
6
45 sec
B.6.A: DNA Components
Q.
The sequence of nitrogenous bases in DNA varies widely. The sequence of the bases in DNA is most important for which of the following?
7
30 sec
B.6.A: DNA Components
Q.
In 1952 Rosalind Franklin took the x-ray photograph shown below, which gave the world its first look at DNA. By studying this photograph, scientists gained knowledge about the —
8
30 sec
B.6.A: DNA Components
Q.
A model of a DNA molecule is shown below. The arrow indicates —
9
30 sec
B.6.A: DNA Components
Q.
Characteristics such as a widow’s peak or attached earlobes are determined by the genetic code. Which components of DNA are referred to as the genetic code?
10
30 sec
B.6.A: DNA Components
Q.
How does DNA in cells determine an organism’s complex traits?
11
30 sec
B.6.A: DNA Components
Q.
Students are given data from an investigation that identified some of the chemical elements present in four different samples.
12
60 sec
B.6.A: DNA Components
Q.
Which part of a DNA molecule is responsible for the direct coding of specific traits in an organism?
