BI 101 Unit 5 Quiz

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Unit 5 Quiz
Which of the following statements is true about DNA?
At the beginning of protein synthesis, a section of a DNA molecule unwinds and
unzips
All of our DNA is normally located in the nucleus of our cells
DNA is composed of nucleic acids, phosphates, sugars, and
bases.
Which two Cambridge scholars built a DNA model in 1953 which was later donated to the
National Science Museum?

2. Krankee and
Chegwin
Crick and Watson
Wilkins and
Franklin
Pauling and
Astbury
The process of translating mRNA into protein occurs...
at the
ribosomes

3. within the
nucleus
inside the
Lysosomes
inside the
Peroxisomes
Which of the following is not a stop codon ?
GU
A
UA
A

4. UA
G
UG
A
The "start" codon is
UUU
.
CUC
.
GUC
.

5. AUG
.
AUA
.
Every polypeptide chain formed in translation starts with the amino acid :
lysine
methionin
e
serine

6. alanin
e
Because one original strand of the double stranded DNA helix is found in each daughter
cell (after cell division), the DNA replication process is :
semiconservati
ve
conservative
derivativ
e
dispersi
ve

7. How many amino acids are encoded by the following mRNA sequence : UAU CAU CCA
CUU GGU UGA ? 5 is incorrect
5
6
4
7
A ribosome is an organelle found in the cytosol of all cells. It is composed of RNA and
ribosomal proteins which translate mRNA into protein (i.e a polypeptide chain).
The triplet base sequence of tRNA nucleotides that is complementary to an mRNA codon
(for a particular amino acid) is called :

8. an
anticodon
a
transposon
a
retroposon
a cistron
The DNA molecules of different species differ in their :
phosphate
backbone

9. sequence of bases
type of
nucleotides
All of the above
The process of protein manufacture within ribosomes using mRNA is called :