Question 1
A timeline of important discoveries about DNA is shown below. These discoveries have contributed to our current knowledge about DNA.
Image
Which statement best summarizes the development of knowledge about DNA over time?
a
Ideas about DNA have remained unchanged over time.
b
Scientists gained more knowledge about DNA as new evidence became available.
c
Past knowledge about DNA was discarded as each new discovery was made.
d
Changes in ideas about DNA are based on opinion.
Question 2
Why is tRNA called "transfer" RNA?
Making Sense of Truck Classification
a
They look like a little truck under the microscope.
b
It carries/transfers the code for one gene from the DNA to the ribosome.
c
It carries/transfers a specific amino acid to the ribosome during protein synthesis.
d
It carries/transfers codes for proteins from the cytoplasm to the DNA.
Question 3
A DNA strand that has the bases CTA GGT, has a complimentary strand with the bases ________.
a
GAT CCA
b
AGC TTG
c
TCG AAC
d
GAU CCA
Question 4
Why is mRNA called "messenger" RNA?
a
It looks like letters with a "message" under the microscope.
b
It carries codes for proteins from the cytoplasm to the DNA for DNA synthesis.
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 5
The diagram shows three types of mutations.
Which correctly identifies each type of mutation in the diagram?
A.
Letter Type of Mutation
W deletion
X insertion
Y substitution
B.
Letter Type of Mutation
W insertion
X substitution
Y deletion
C.
Letter Type of Mutation
W substitution
X deletion
Y insertion
D.
Letter Type of Mutation
W insertion
X deletion
Y substitution
a
A
b
B
c
C
d
D
Question 6
During mRNA transcription, a DNA strand has the bases CTAGGT. What is the complementary strand of mRNA?
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a
TCGAAC
b
GATCCA
c
AGCTTG
d
GAUCCA
Question 7
According to your Genetic Code Sheet, which of the following amino acid sequences corresponds to this mRNA strand?
CUC AAG UGC UUC
a
leu - cys - pro - phe
b
leu- lys - cys - phe
c
leu - glu - leu - val
d
lys - leu - cys - phe
Question 8
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 9
Eukaryotic DNA is packed in a chromatin structure, making it harder than prokaryotic DNA to be transcribed. Which proteins are directly involved in the structure of eukaryotic DNA?
arnold protein meme – Stone Strength Systems Gym
a
Actins
b
polymerases
c
histones
d
collagens
Question 10
Which of the following is a nucleotide found in DNA?
a
ribose + phosphate group + uracil
b
deoxyribose + phosphate group + uracil
c
deoxyribose + phosphate group + cytosine
d
ribose + phosphate group + thymine
answer 1-10
1. b
2. c
3. b
4. d
5. c
6. b
7. b
8. c
9. c
10. d