Translation and Translocation

Q. UAA, UAG and UGA are known as

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

Q. The triplet sequence present in tRNA complimentary to mRNA is called:

1. Codon
2. Anticodon
3. Protein
4. Nucleoside

Q. Movement of ribosome from one codon to the other is called .

1. translocation
2. transcription
3. translation

Q.

Which of the following is a function of tRNA?

1. Production of mRNA

2. Production of microsomes

3. Selection of amino acids

4. Production of ribosomes

Q. Correct sequence of code transfer during polypeptide formation is

1. DNA, mRNA, tRNA and amino acids
2. DNA, tRNA, rRNA and mRNA
3. mRNA, tRNA, DNA and amino acids
4. rRNA, DNA, mRNA and tRNA

Q.

Is RNA an amino acid?

Q. The process of making proteins from mRNA sequence is called .

1. translation
2. translocation
3. transcription

Q. Assertion :In bacterial translation mechanism, two tRNA are required by methionine. Reason: AUG codes for methionine and it shows non ambiguity also.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Ribosome attaches to the start codon.

1. False
2. True

Q.

The function of tRNA is_________

1. Production of mRNA

2. Production of microsomes

3. Production of ribosomes

4. Selection of amino acids

Q. mRNA having codon AUG will bind to anticodon UAA.

1. False
2. True

Q.

Read the following statement and inferences, and select the correct option.

Statement: The core of the larger ribosomal subunit, where the catalysis of the peptidyl bond happens between one amino acid and the next, is made up entirely of rRNA.

Inference:

A. rRNA is smaller than proteins and hence can fit in the smallest of crevices

B. rRNA has catalytic capability and hence confers the name ribozyme to ribosome

C. The proteins which make up ribosome do not have a significant role to play in its catalytic activity

Which of the inferences are true?

1. B and C only
2. A only
3. All of the above
4. D only

Q. What is the primary function of rRNA in prokaryotes?

Q. Which of the following carries information for protein synthesis from the genes?

1. mRNA
2. rRNA
3. tRNA
4. DNA

Q. Aminoacylation of tRNA is essential for

1. Replication of RNA
2. Initiation of transcription
3. Termination
4. Formation of peptide bond
5. Splicing

Q.

In the genetic code, all codons consist of:

1. Three nucleotides

2. One nucleotide

3. Two nucleotides

4. Four nucleotides

Q. Which of the following summarises the cental dogma of molecular biology in humans?

1. DNA transcribed to proteins and proteins translated into RNA.
2. RNA transcribed to DNA and DNA translated into proteins.
3. DNA transcribed to RNA and RNA translated into proteins.
4. Protein transcribed to DNA and translated into RNA