(a) AUG
(b) UAA
(c) UAG
(d) UGA
Answer- (a) AUG
Category: Biology Second Paper
Which enzyme breaks hydrogen bonds during DNA replication? [HSC-MCQ 2016]
(a) Helicase
(b) Primase
(c) Polymerase
(d) Ligase
Answer- (a) Helicase
ATTACGGCATTACG bond is – [HSC-MCQ B: 2016]
(i) Glycosidic
(ii) Esters
(iii) Phospho-diesters
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
Answer- (d) i, ii and iii
What is the number of hydrogen bonds in ATTACGGCATTACG? [HSC-MCQ 2016]
(A) 7
(b) 14
(c) 17
(d) 21
Answer- (c) 17
Which is present in all cells? [HSC-MCQ 2016]
(a) Ribosome
(b) Mitochondria
(c) Chloroplast
(d) Lysosomes
Ans- (a) Ribosome
If the colorless grasses are exposed to sunlight for some time- [HSC-MCQ D. B: 2016]
(i) Leucoplast will transform into chloroplast
(ii) The grasses will become colourless
(iii) The grasses will be green in colour
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
Answer- (b) i and iii
The reason why the grass buried under the brick is colorless – [HSC-MCQ D. B. 2016]
(a) Destruction of plastids
(b) Transformation of chloroplast into leucoplast
(c) Transformation of chloroplast into chromoplast
(d) Transformation of leucoplast into chromoplast
Ans- (b) Transformation of chloroplast into leucoplast
Cells that synthesize proteins are- [HSC-MCQ D. B. 2016]
(a) Lysosomes
(b) Ribosome
(c) Golgibody
(d) Mitochondria
Ans- (b) Ribosome
Which chromosome is located in the middle of the centromere? [HSC-MCQ D. B. 2016]
(a) Metacentric
(b) Sub-metacentric
(c) Acrocentric
(d) Telocentric
Ans- (a) Metacentric
Nucleus- [HSC-MCQ C: B: 2016]
(i) Located in the center of the plant cell
(ii) Regulates cell division
(iii) Produces mRNA
(a) i and ii
(b) i and iii
(c) ii and iii
(d) i, ii and iii
Answer- (c) ii and iii