Lesson 10: Nucleotides, Nucleic Acids And Heredity

Question 1

A nucleotide is made up of a

Select one:

a. Base, polysaccharide and phosphate
b. Polysaccharide and phosphate
c. Base and monosaccharide
d. Base and phosphate
e. Base, monosaccharide and phosphate

Answer 1

e. Base, monosaccharide and phosphate

Question 2

A sequence of DNA is copied or transcribed to which type of RNA?

Select one:

a. siRNA
b. rRNA
c. snRNA
d. tRNA
e. mRNA

Answer 2

e. mRNA

Question 3

DNA mutations may be caused by

Select one:

a. Chemicals
b. Highly reactive oxidizing agents
c. All of these answers are correct
d. Ionizing radiation
e. Replication errors

Answer 3

c. All of these answers are correct

Question 4

During DNA replication, the new cell contains one parent strand of DNA and one newly synthesised strand of DNA. True or False?

Answer 4

True

Question 5

Genes are found in the cytoplasm of cells. True or False?

Answer 5

False

Question 6

Only the exons of the DNA are transcribed onto the mRNA. True or False?

Answer 6

False

Question 7

Satellites occur at the ends and center of chromosomes and appear to provide structural stability. True or False?

Answer 7

True

Question 8

Segments of DNA that don’t seem to code for anything are

Select one:

a. Satellites
b. Codons
c. Introns and satellites
d. Introns
e. Exons

Answer 8

c. Introns and satellites

Question 9

The complementary base pair of cytosine is always

Select one:

a. Adenine
b. Guanine
c. Thymine
d. Uracil
e. Cytosine

Answer 9

b. Guanine

Question 10

The secondary structure of DNA is the

Select one:

a. Combined DNA and histone complex
b. Sequence of nucleotides
c. Chromatin form
d. All of these answers are correct
e. Double helix formation

Answer 10

e. Double helix formation

Question 11

There is continuous synthesis of the leading strand during DNA replication. True or False?

Answer 11

True

Question 12

Which enzyme adds nucleotides to the 3’ end of a new strand of DNA that is being synthesized?

Select one:

a. DNA glycosylase
b. DNA polymerase
c. RNA polymerase
d. Ribozyme
e. DNA ligase

Answer 12

b. DNA polymerase

Question 13

Which of the following is NOT an RNA base?

Select one:

a. Uracil
b. Guanine
c. Cytosine
d. Adenine
e. Thymine

Answer 13

e. Thymine

Question 14

Which of the following is thought to be influenced by genetics?

Select one:

a. Susceptibility to certain diseases
b. All of these answers are correct
c. Physical characteristics
d. Intelligence
e. Areas of talent

Answer 14

b. All of these answers are correct

Question 15

Which type of RNA transports amino acids to the site of protein synthesis in ribosomes?

Select one:

a. rRNA
b. siRNA
c. tRNA
d. mRNA
e. snRNA

Answer 15

c. tRNA