Features of Codon

Q. A codon always codes for a single amino acid and never otherwise. This property of codons represents its

1. Non-overlapping nature
2. Degenerate nature
3. Non-ambiguous nature
4. Polar nature

Q. UAA, UAG and UGA are known as

1. start codons
2. stop codons
3. initiator codons
4. coding codons

Q. All the terminator codons begin with

1. Guanine
2. Uracil
3. Cytosine
4. Adenine

Q. The number of codons coding for the 20 known amino acids is

1. 64
2. 60
3. 61
4. 67

Q. Polypeptide chain begins with

1. Glycine
2. Leucine
3. Methionine
4. Lysine

Q.

The amino acid constituent of a protein is given: Methionine, Valine, Tyrosine, Arginine, Threonine, Stop codon. Choose the correct DNA sequence from below which codes for it.

1. TCAGCCTGTTCTGCGATC
2. AUGCAAATGTGTATGUAG
3. TACATGTCTAGGUGAAUG
4. TACCAAATGTCTTGCATC

Q. What is the anticodon for UAG?

1. TUC
2. It has no anticodons
3. AUC
4. It has multiple anticodons

Q. Termination of polypeptide chain formation is brought about by

1. UUG, UAG, UCG
2. UAA, UAG, UGA
3. UUG, UGC, UCA
4. UCG, GCG, ACC

Q. Nonsense codon takes part in

1. Terminating the process of protein synthesis
2. Formation of unspecified amino acids
3. Releasing tRNA from polypeptide chain
4. Conversion of sense DNA into nonsense one

Q. A group of three bases in a strand of mRNA that code for amino acids are called .

1. anticodons
2. nitrogenous bases
3. nucleosides
4. codons