94' SBIOA Exam
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93
Exam Part A: M/C Part B: Short Answers Part C: Essay Question 94 Exam 95
Exam 97
Exam
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Part A: Multiple Choices(con't) Page
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41.
If
the base sequence in DNA is AATCGG, what is the sequence of the
complementary chain?
a.
TTGCAA
b.
CCATUU
c.
TTAGCC
d.
UUAGCC
e.
TTUGCC 42.
The
process by which the anticodons on the transfer RNA molecules match
their complementary codons on the messenger RNA molecules is called
a.
transcription.
b.
transpiration.
c.
t ranslation.
d.
replication.
e.
translocation. 43.
During
translation, a transfer RNA (tRNA) molecule is associated with
a.
an amino acid, a messenger RNA molecule and a ribosome.
b.
an amino acid, a DNA molecule, and a ribosome.
c.
an amino acid molecule, a DNA molecule, and a ribosome.
d.
a DNA molecule, a messenger RNA molecule, and a ribosome.
e.
an amino acid, a ribosome, and a nucleolus. 44.
During
the synthesis of proteins in cells, coded information is carried from
the nucleus to the ribosomes by
a.
transfer RNA.
b.
amino acids.
c.
ribosomal RNA.
d.
part of a strand of DNA.
e.
messenger RNA. 45.
Haemophilia is expressed in the phenotype by
a.
females only.
b.
males only.
c.
females, rarely.
d.
females, usually.
e.
males and females equally. 46.
In
green pea plants, tallness is dominant over dwarfness, and yellow seeds
are dominant over green. If a fully heterozygous tall plant with
yellow seeds were crossed with a dwarf plant bearing green seeds, the
phenotype ratio of the offspring would be
a.
1:1
b.
1:1:1:1
c.
3:1
d.
9:3:3:1
e.
all tall plants with yellow seeds 47.
If
a colour blind man and a woman who is a carrier of colour blindness have
a son, what are the chances that their son will be colour blind?
a.
0
b.
25%
c.
50%
d.
75%
e.
100% 48.
A
farmer bought a bull that was said to be homozygous hornless. To
be sure that this statement was true, he performed a test cross between
the bull and a horned cow. If the bull were indeed homozygous hornless,
the offspring from the testcross would be
a.
in a ratio of 3 horned to 1 hornless
b.
all horned
c.
half horned, half hornless
d.
in a ratio of 3 hornless to 1 horned
e.
a ll hornless 49.
If
all four possible blood types are represented in the offspring of the
same parents, the phenotypes of the parents must be
a.
both type AB
b.
both type O
c.
type AB and type O
d.
type A and type B
e.
type B and type O 50.
Four
of the following are features of the process of meiosis and only one is a feature of mitosis. Which one
is a feature of mitosis?
a.
Crossing over occurs.
b.
Daughter cells are genetically identical.
c.
Tetrad formation takes place.
d.
Two divisions occur before the process is complete.
e.
Homologous chromosomes come together and synapse.
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