Features of Codon

Q.

Is genetic code overlapping?

Q. What is the anticodon for UAG?

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

Q.

How many codons in a genetic code is stop codons?

Q.

When is a Code degenerate?

Q. All the terminator codons begin with

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

Q. Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a "triplet"?

1. Beadle and Tatum
2. Nirenberg and Mathaei
3. Hershey and Chase
4. Morgan and Sturtevant

Q. UAA, UAG and UGA are known ascodons.

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

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

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

Q. Which of the following statements is/are wrong?
I. Six codons do not code for any amino acid.
II. A codon is read in mRNA in a contiguous fashion.
III. Three codons function as stop codons.
IV. The initiator codon AUG codes for methionine.

1. I, II and IV
2. I, II and III
3. II, III and IV
4. II
5. I

Q.

Which of the following corrborales the fact the genetic code is degenerate?

1. One coden codes for only one amino acid.

2. One amino acid can be coded by different codons.

3. There are three codons who do not code for only amino acid.

4. None of the above

Q. Genetic code has

1. more tRNAs than codons
2. less codons than amino acids they code for
3. more codons than amino acids they code for
4. equal number of codons and amino acids

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. AUGCAAATGTGTATGUAG
2. TACATGTCTAGGUGAAUG
3. TACCAAATGTCTTGCATC
4. TCAGCCTGTTCTGCGATC

Q.

What would happen if in a gene encoding a polypeptide of 50 amino acids, the 25th codon UAU mutated to UAA:

1. A polypeptide of 24 amino acids will be formed

2. Two polypeptides of 24 and 25 amino acids will be formed

3. A polypeptide of 49 amino acids will be formed

4. A polypeptide of 25 amino acids will be formed

Q. Polypeptide chain begins with

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

Q. One amino acid has more than one codon.

1. True
2. False

Q. What is not true for genetic code?

1. It is unambiguous
2. A codon in mRNA is read in a noncontiguous fashion
3. It is nearly universal
4. It is degenerate