16- Which ONE of the following is true concerning Antidiuretic hormone(ADH)?
1) Carbamazepine potentiates it's release
2) Ethanol potentiates it's release
3) It circulates in the blood bound to neurohypophysin
4) It is a cyclic octapeptide
5) It is synthesised in the posterior pituitary
Answers-1
17- Restriction enzymes:
1) Cut DNA
2) Join two pieces of DNA together
3) Synthesize DNA
4) Degrade DNA
5) Are involved in cell cycle arrest
Answers-1
Restriction enzymes cut DNA at sequences specific for each restriction enzyme, they are vital tools for molecular biology and molecular genetic research.
18- Reverse transcriptase-PCR is used to ampify:
1) Antibodies
2) DNA
3) RNA
4) Protein
5) Plasmids
Answers-3
Reverse transcriptase PCR is a means of amplifying RNA. The RNA is transcribed into complimentary DNA (cDNA) using the enzyme reverse transcriptase, the cDNA
is then amplified by conventional PCR.
19- The level of cellular telomerase activity will affect:
1) The rate of cell growth
2) Cell death
3) The number of cell divisions a cell is capable of undergoing
4) Cell survival
5) RNA synthesis
Answers-3
The telomere is a DNA sequence at the end of each chromosome which becomes progressively shorter with each division the cell undergoes. When it is reduced to a
critical length the cell is not capable of dividing, the enzyme telomerase is able to lengthen the telomere thus preventing this occurring.
20- Which of the following is activated by Cholera toxin?
1) Adenylate cyclase
2) Guanlyate cyclase
3) Peroxisome proliferator receptor (PPAR) gamma
4) Sodium/potassium ATPase
5) The glucose-sodium transporter
Answers-1
Cholera toxin activates adenylate cyclase with generation of cAMP.
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1) Carbamazepine potentiates it's release
2) Ethanol potentiates it's release
3) It circulates in the blood bound to neurohypophysin
4) It is a cyclic octapeptide
5) It is synthesised in the posterior pituitary
Answers-1
17- Restriction enzymes:
1) Cut DNA
2) Join two pieces of DNA together
3) Synthesize DNA
4) Degrade DNA
5) Are involved in cell cycle arrest
Answers-1
Restriction enzymes cut DNA at sequences specific for each restriction enzyme, they are vital tools for molecular biology and molecular genetic research.
18- Reverse transcriptase-PCR is used to ampify:
1) Antibodies
2) DNA
3) RNA
4) Protein
5) Plasmids
Answers-3
Reverse transcriptase PCR is a means of amplifying RNA. The RNA is transcribed into complimentary DNA (cDNA) using the enzyme reverse transcriptase, the cDNA
is then amplified by conventional PCR.
19- The level of cellular telomerase activity will affect:
1) The rate of cell growth
2) Cell death
3) The number of cell divisions a cell is capable of undergoing
4) Cell survival
5) RNA synthesis
Answers-3
The telomere is a DNA sequence at the end of each chromosome which becomes progressively shorter with each division the cell undergoes. When it is reduced to a
critical length the cell is not capable of dividing, the enzyme telomerase is able to lengthen the telomere thus preventing this occurring.
20- Which of the following is activated by Cholera toxin?
1) Adenylate cyclase
2) Guanlyate cyclase
3) Peroxisome proliferator receptor (PPAR) gamma
4) Sodium/potassium ATPase
5) The glucose-sodium transporter
Answers-1
Cholera toxin activates adenylate cyclase with generation of cAMP.
More Questions & Answers:-
Page1 Page2 Page3 Page4 Page5
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