Features of Codon

Q.

If there are 999 bases in an RNA that code for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?

1. 1

2. 11

3. 33

4. 333

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

Q. UAA, UAG and UGA are known as

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

Q. The number of codons that code different amino acids is

1. 16
2. 31
3. 61
4. 64

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. term biochemistry was given by whom ?

Q. One amino acid has more than one codon.

1. True
2. False

Q. Which of the following implies that the genetic code is unambiguous?

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. It is possible to produce a human protein inside a bacteria, using recombinant DNA technology, because

1. splicing of introns from RNA transcript occurs in bacterial cells
2. the genetic code is universal
3. All of these
4. the mechanism of gene regulation is identical in humans and bacteria

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 number of codons coding for the 20 known amino acids is

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