Question

Question 1
What is the function of helicase?

a
It forms the DNA helix.
b
It separates DNA strands.
c
It forms bonds between DNA nucleotides.
d
It adds new nucleotides to the DNA helix.
Question 2
Tyra created a chart that compared DNA and RNA for her science class.



Tyra made a mistake while she was creating her chart. Which best identifies the mistake Tyra made?

a
DNA has bases of A, G, C, and U while RNA has bases of A, G, C, and T.
b
DNA remains in the nucleus while RNA leaves the nucleus.
c
DNA is single-stranded while RNA is double-stranded.
d
DNA contains a ribose sugar while RNA contains a deoxyribose sugar.
Question 3
What is regulated gene expression?




a
a process by which microarrays detect which cells are producing which proteins
b
a method for blotting DNA fragments onto a positively charged membrane
c
the cell's ability to turn on and off genes at particular times
d
the unique gene pattern created by a genetic cross
Question 4
The table below shows the percentages of bases in a DNA sample. How much Adenine (A) should you expect to find in the sample?



a
17%
b
33%
c
50%
d
72%
Question 5
The nucleotide T always pairs with



a
C
b
another T
c
G
d
A
Question 6
Why is mRNA called "messenger" RNA?




a
It carries codes for proteins from the cytoplasm to the DNA for DNA synthesis.
b
It looks like letters with a "message" under the microscope.
c
It acts as a virus, carrying the message of cellular control.
d
It carries codes for proteins from DNA into the cytoplasm to be used in protein synthesis.
Question 7
Assume that two strands of DNA have been separated and that the base sequence on one strand is AGCC. What is the sequence of bases on the complimentary strand of DNA?

Pin on Animations

a
GCTT
b
AGCC
c
TCGG
d
TACA
Question 8
A timeline of important discoveries about DNA is shown below. These discoveries have contributed to our current knowledge about DNA.

Which statement best summarizes the development of knowledge about DNA over time?

a
Scientists gained more knowledge about DNA as new evidence became available.
b
Changes in ideas about DNA are based on opinion.
c
Past knowledge about DNA was discarded as each new discovery was made.
d
Ideas about DNA have remained unchanged over time.
Question 9
Review this diagram; select the response that BEST describes label #1.

Locus (genetics) - Wikipedia

a
chromatin
b
chromatid
c
sister chromosomes
d
centromere
Question 10
What is occurring in the G1 and G2 phases of a normal cell cycle?

a
nuclear division
b
cell division
c
chromosome replication
d
growth

Answer 1

1. b
2. a
3. c
4. b
5. d
6. d
7. c
8. a
9. d
10. d