Biology
2250 - Principles of Genetics - Dr. Carr
Sample exam questions (for Midterms I & II, &
Final Exam)
These examples
are intended to show the STYLE
of questions that MAY
be asked on exams, NOT the specific questions
that will be asked.
For exams, you will be given
a sheet with the Universal Genetic Code: it is therefore not necessary
to memorize the genetic code.
I. MOLECULAR BIOLOGY: For each question, indicate in the
space provided the LETTER of the ONE response that best
answers the question.
______
In double-stranded RNA
regions, the bonds that hold complementary nucleotides
together are described as
A.
ionic
B. covalent C.
hydrophobic D. hydrogen
E. hydrophilic
______
The tertiary structure of protein is determined by
A.
beta
sheets B. hydrogen bonds
C. disulfide bonds D. alpha helices
E. subunit arrangement
______ The active site of an
enzyme is most likely
to be composed of amino acids with the following
characteristics:
A.
Polar
&
Hydrophobic B. Polar &
Hydrophilic C. Non-polar & Hydrophobic D.
Non-polar & Hydrophilic
______
Semi-conservative DNA replication was demonstrated by
A.
Watson & Crick B. Meselson &
Stahl C. Hershey &
Chase D. Luria & Delbruck
E. Penn & Teller
______ If
the template strand of a piece of DNA reads 3'
- AAAAAATTT - 5', its protein product will read:
A. H3N - F
F K - COOH B.
HOOC - F K K - NH3
C. H3N - K F F -
COOH D. HOOC - K
K F - NH3
In not
more than three grammatically complete sentences,
identify and correct the error. Do NOT draw diagrams.
Ex.: "Met- mutants are caused by a defect of methionine that block its synthesis."
Ex.: "Most people do not have Cystic Fibrosis because they do not have the gene for Cystic Fibrosis."II. MENDELIAN GENETICS. For each question, indicate in the
space provided the LETTER of the ONE response that best answers
the question.
Ex: "Brown eyes (B)
are dominant to blue eyes (b). Both of my parents have brown
eyes, but I have blue eyes. Since eye colour is genetic, I
must be adopted."
Sample answer: If
eye colour were a simple Mendelian trait, your parents
might both be Bb heterozygotes for
brown eyes, and you could be a blue-eyed bb homozygote with blue eyes.
______ A
woman is heterozygous for an X-linked recessive allele that
causes night-blindness. If she marries a man with
night-blindness, what proportions of her female & male
offspring will carry the night-blindness allele?
A) all,
none B) all,
half C) half,
half D) half,
none E) none, half
F) none, all
______ In Bushwa trees, the locus for leaf
colour has three alleles: R
(red), G (green), and
B (brown). R is dominant to G, G is dominant to B. In the progeny of the
cross BR x BG, what fraction will be
brown ?
A)
All B)
3/4 C)
1/2 D)
1/4 E) 0
______ Two individuals heterozygous for semi-dominant traits
at four loci are crossed: how many F2 genotypes are
expected?
A)
4 B) 9 C)
16 D) 27
E) 32
F) 64 G) 81
III. Biotechnology &
Genomics. For
each question, indicate in the space provided the LETTER of
the ONE response that best answers the question.
_______Which of the following
could be Type-II restriction endonuclease recognition sites?
A. CGCGCG
B. AGCCGA
C. AUGCAU
D. GGAAGG
E. None of the them F. All
of them
_______ Oligonucleotides are
described as "sticky." What makes them "sticky" ?
A. They bind to
polynucleotides B. They bind to
mRNA C. They bind to
ddNTPs D. They bind to
hnRNA E. They bind to DNA
F. Two of these
_______ Southern Blots are
used to detect rare genes. In a Southern blot analysis:
A. DNA probes
bind to a base-complementary DNA
B. DNA probes
bind to an immobilized mRNA
C. RNA probes
bind to corresponding cDNA
D. RNA probes
bind to mRNA
E. Protein binds
to corresponding mRNA
F. Protein binds
to corresponding DNA
_______ A bioinformatic
search for open reading frames will most use which of the
following data base tools?
A. GenBank
B. HuGO C. ExPASy
D. CanLit E. ENSEMBL
F. ORFAnn
IV. GENETIC STRUCTURES: The numbers in the left-hand
column refer to structures on the right. For each numbered
structure, write the letter of the correct term.
The following DNA is part of a gene that
codes for a polypeptide of at least seven amino acids:
3' caattgattagtcagtcaattgat 5'
5' gttaactaatcagtcagttaacta 3'
i. Which strand
includes an Open Reading Frame? Top (T) or
Bottom (B)
ii. Which DNA
strand is the sense strand? Top (T) or
Bottom (B)
iii. Give the mRNA sequence that would be
transcribed from this gene; label the 5' & 3'
ends.
iv. Give the seven amino acids that would be translated from
the correct message; label the C & N ends.
VI. PEDIGREE
ANALYSIS: Given the pedigree shown, which of
the six modes of inheritance are possible?
Which is most likely? What observations would
change this?
VII.
TRI-HYBRID THREE-POINT TEST
CROSS: From the following recombination data,
draw a physical map to indicate the correct order and
distances between loci.
VIII. RESTRICTION
MAPPING:
From the following fragment size data, draw a restriction map.
Label the sites, provide a scale in Kbp.
Watson & Crick received
the Nobel Prize in what year?
(a) 1953 (b) 1962 (c) 1973
(d) 1984
Transcription proceeds in which
of the following directions
(a) 3' 1' (b) 2' 4' (c) 3' 5' (d) 4' 6' (e) 5' 3'
Which of the following amino
acids is/are non-polar?
(a)
Draw the structure of
Deoxyadenosine monophosphate.
Outline the process of
DNA replication.
What are
the clues for
sex-linked inheritance?
How many introns are present in the chicken ovalbumin gene? (a) 4 (b) 5 (c) 6 (d)
7 (e) more than 7
Text material (c) 2016 by Steven M. Carr