Questions and answers for exam Preparation

MCQs

Total Questions : 282 | Page 22 of 29 pages

Question 211. The RP13 gene of chromosome 17 codes for a protein __________ .

involved in the determination of personality
involved in eye development
involved in glucose transport
that is a component of hair and nails

Discuss Question

Answer: Option B. -> involved in eye development

Question 212. Restriction enzymes are named for

the viral DNA that they attack
the bacterium they are derived from
None of these
the person who discovered

Discuss Question

Answer: Option B. -> the bacterium they are derived from

Question 213. Which of these genes codes for a protein that plays a role in white blood cell function?

RP13
DCP1
MPO
GLUT4

Discuss Question

Answer: Option C. -> MPO

Question 214. When populations are small, gene frequencies can change from generation to generation and some alleles may become fixed in a population. This is called __________ .

genetic drift
assortative mating
inbreeding
heterosis

Discuss Question

Answer: Option A. -> genetic drift

Question 215. In gel electrophoresis, DNA molecules migrate from __________ to __________ ends of the gel.

negative ... positive
positive to negative
long ... short
basic ... acidic

Discuss Question

Answer: Option A. -> negative ... positive

Question 216. Which of the following is correct in terms of determination of location of genetic traits?

None of these
Known protein coding sequences are too far apart to allow linkage determination for most new genes
Protein-coding genes are always associated with a restriction pattern
Restriction sites allow DNAs to be digested

Discuss Question

Answer: Option B. -> Known protein coding sequences are too far apart to allow linkage determination for most new genes

Question 217. First discovered, Type II restriction endonuclease was

Hind II
EcoRI
Eco K
Hinf I

Discuss Question

Answer: Option A. -> Hind II

Question 218. Restriction enzymes

cut DNA in a staggered fashion
protect bacteria from viral infection
All of these
cut DNAs producing a blunt end

Discuss Question

Answer: Option C. -> All of these

Question 219. Some genetic diseases cannot be diagnosed by changes in restriction sites. Some of these can be detected by allele-specific oligonucleotide probes. These are

copies of the gene with an altered sequence so that a restriction site is inserted
PCR-amplified variable numbers of tandem repeats (VNTRs)
short sequences that will hybridize only to a specific base sequence
mutagenized copies of a gene

Discuss Question

Answer: Option C. -> short sequences that will hybridize only to a specific base sequence

Question 220. Both DNA gel electrophoresis and SDS-PAGE of proteins are similar because