4. When multiple ribosomes work along a single RNA molecule: A. they all produce

Question

4. When multiple ribosomes work along a single RNA molecule: A. they all produce the same protein. B. it is called a polyribosome. C. they finish protein synthesis at the same time. D. A and B. E. All of the above. 5. mRNA surveillance includes all of the following EXCEPT: A. verification that the genotype is converted accurately. B. nonsense-mediated mRNA decay. C. ribosome stalling. D. bacterial use of tmRNA. E. Actually, all of these are forms of mRNA surveillance. 4. When multiple ribosomes work along a single RNA molecule: A. they all produce the same protein. B. it is called a polyribosome. C. they finish protein synthesis at the same time. D. A and B. E. All of the above.

Explanation / Answer

4. When multiple ribosomes work along a single RNA molecule they are called a polyribosome. Many ribosomes simultaneously read one mRNA to produce multiple copies of protein simultaneously.

Hence, the correct option is (B) it is called a polyribosome.

5. mRNA surveillance allows the detection and destruction of mRNAs that contain premature termination codons by a process called nonsense-mediated decay. In the given list, all are features of mRNA surveillance.

Hence, the correct option is (E) Actually, all there are forms of mRNA surveillance.

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