1.
What will be the sequence of mRNA produced by the following stretch of DNA?
3'ATGCATGCATGCATG 5' TEMPLATE STRAND 5' TACGTACGTACGTAC 3' CODING STRAND
A.
3' AUGCAUGCAUGCAUG 3'
B.
3' AUGCAUGCAUGCAUG 5'
C.
5' UACGUACGUACGUAC 3'
D.
3' UACGUACGUACGUAC 5'
Answer :
5' UACGUACGUACGUAC 3'
2. One function of the telomeres in a chromosome is to
A.
indentify the correct number of the homologous pair of chromosomes
B.
help two chromatids to move towards poles
C.
"seal" the ends of chromosomes
D.
start RNA synthesis
Answer :
"seal" the ends of chromosomes
3. Which one of the following is not applicable to RNA?
A.
5' phosphoryl and 3' hydroxyl ends
B.
Heterocyclic nitrogenous bases
C.
Chargaff's rule
D.
Complementary base pairing
Answer :
Chargaff's rule
4. A sequential expression of a set of human genes
A.
messenger RNA
B.
DNA sequence
C.
ribosome
D.
transfer RNA
Answer :
DNA sequence
5.
Given below is a sample of a portion of DNA strand. What is so special shown in it?
5' -- GAATTC -- 3'
3' -- CTTAAG -- 5'
A.
Replication completed
B.
Deletion mutation
C.
Start codon at the 5' end
D.
Palindromic sequence of base pairs
Answer :
Palindromic sequence of base pairs
6. In which direction m-RNA is synthesised on DNA template ?
A.
5' → 3'
B.
3' → 5'
C.
Both (A) and (B)
D.
Any
Answer :
5' → 3'
7. In the process of transcription in Eukaryotes, the RNA polymerase I transcribes -
A.
Precursor of mRNA, hnRNA
B.
mRNA with additional processing, capping and tailing
C.
tRNA, 5 srRNA and snRNAs
D.
rRNAs - 28 S, 18 S and 5.8 S
Answer :
rRNAs - 28 S, 18 S and 5.8 S
8. In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids ?
A.
60
B.
20
C.
64
D.
61
Answer :
61
9.
The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks $$A$$ to $$C.$$
A.
$$A$$-translation $$B$$- transciption $$C$$-Erwin Chargaff
B.
$$A$$-transcription $$B$$- translation $$C$$-Francis Crick
C.
$$A$$-translation $$B$$- extension $$C$$-Rosalind Franklin
D.
$$A$$-transcription $$B$$- replication $$C$$-James Watson
Answer :
$$A$$-transcription $$B$$- translation $$C$$-Francis Crick
10. During DNA replication, Okazaki fragments are used to elongate:
A.
The lagging strand towards replication fork
B.
The leading strand away from replication fork
C.
The lagging strand away from the replication fork
D.
The leading strand towards replication fork
Answer :
The lagging strand away from the replication fork