Gene mutations & protein synthesis multiple choice questions

Gene Mutations & Protein Synthesis

Total marks:0 / 10

1 of 10

Which statements about mRNA are correct?

1 - mRNA can form base pairs

2 - mRNA can form hydrogen bonds

3 - mRNA is single stranded

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2 of 10

Which statements about tRNA are correct?

1 - hydrogen bonds between bases temporarily hold tRNA against mRNA

2 - the base sequences in the tRNA molecules are the same as the base sequences in the mRNA that is being translated

3 - tRNA translates the base sequence in mRNA into the amino acid sequence in a protein

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3 of 10

The following statements describe the process of translation:

1 - a peptide bond forms between adjacent amino acids

2 - hydrogen bonds form between the anticodon and the codon

3 - mRNA binds to the ribosome

4 - tRNA enters the ribosome carrying a specific amino acid

In which order does this process take place?

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4 of 10

The following events occur during transcription:

1 - bonds break between complementary bases

2 - bonds form between complementary bases

3 - sugar-phosphate bonds form

4 - free nucleotides pair with complementary nucleotides

Before the mRNA leaves the nucleus, which events will have occurred twice?

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5 of 10

What does the process of translation require?

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6 of 10

Which type of molecule is always the end product of transcription?

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7 of 10

The table gives tRNA anticodons for four amino acids.

Table showing tRNA anticodons for amino acids asparagine, glutamic acid, proline, and threonine.

A cell makes a polypeptide with the amino acid sequence: glutamic acid – asparagine – threonine – proline

What was the sequence of bases on the strand of the DNA that was complementary to the mRNA from which this polypeptide was formed?

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8 of 10

The nucleotide sequence of a small section of a transcribed gene is as follows:

CGC CGC ACG CGC

The table shows the amino acids coded for by 10 mRNA codons.

Table showing mRNA codons and their corresponding amino acids including Lys, Thr, Arg, Pro, Ala, Gly, and Cys.

What is the order of the four amino acids in the polypeptide translated from this small section of a gene?

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9 of 10

When a gene mutation occurs, which of the following may be altered, resulting in the production of a non-functional protein?

1 - amino acid sequence

2 - DNA nucleotide sequence

3 - mRNA nucleotide sequence

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10 of 10

Rifampicin is an antibiotic used to treat tuberculosis.

It works by inhibiting RNA polymerase in bacteria.

Which of these processes will be directly inhibited by this antibiotic?

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