Which one of the following remove nucleotides from the ends of DNA or RNA?

A. Endonuclease
B. Exonuclease
C. S 1 nuclease
D. Deoxyribonuclease

Submitted by: Urooj sabar

Exonucleases remove nucleotides from the terminal ends (either 5′ or 3′) of DNA of one strand of duplex. Endonucleases make cut at specific position within the DNA. DNA lagases are known as joining or sealing enzymes.

Related Mcqs:

DNA or RNA of viruses is enclosed in _______________ coat?
A. Protein
B. Carbohydrate
C. Lipid
D. DNA
An enzyme which can convert single stranded RNA into double stranded viral DNA is called____________?
A. DNAase
B. RNAase
C. DNA polymerase
D. Reverse Transcriptase
The DNA fragments have sticky ends due to___________?
A. Endonuclease
B. Unpaired bases
C. Calcium ions
D. Free methylation

Submitted by: Maria Aziz
Which of the following is an RNA virus:
A. Influenza virus
B. Herpes virus
C. HBV
D. Pox virus
Messenger RNA is formed in_________?
A. nucleus
B. chloroplast
C. mitochondria
D. none of these
Ribosomes + m-RNA?
A. Polysome
B. Phlosome
C. Polosome
D. None of these
rRNA constitutes ____________% of the total cellular RNA?
A. 3-4 %
B. 10-20%
C. 80%
D. 90%
RNA interference helps in__________?
A. Cell proliferation
B. Micropropagation
C. Cell defence
D. Cell differentiation

Submitted by: Maria Aziz
A stone measuring 0.4 cm, blocking the outlet of renal pelvis resulting in mild to moderate tract obstruction. Which of the following technique will be opted to remove this stone?
A. Kidney surgery
B. Burring a hole and removing the stone manually (nephrolithotomy)
C. Extracorporeal Shock wave lithotripsy
D. None of these
Which of the following cell organelles does not contain DNA?
A. Nucleus
B. Lysosomes
C. Chloroplast
D. None of these

Submitted by: Nayab Idrees