Which of the following statements about mRNA is correct? a. Eukaryotic mRNA is generally polycistronic while prokaryotic mRNA is monocistronic. b. Both prokaryotic and eukaryotic RNA is polycistronic. c. Both prokaryotic and eukaryotic RNA is monocistronic. d. Eukaryotic mRNA is generally monocistronic while prokaryotic mRNA is polycistronic. 2. Which of the following statements about leading and lagging strand synthesis is correct? a. The lagging strand can only be synthesized once the
Gene Interactions
When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.
Gene Expression
Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.
1. Which of the following statements about mRNA is correct?
a. Eukaryotic mRNA is generally polycistronic while prokaryotic mRNA is monocistronic.
b. Both prokaryotic and eukaryotic RNA is polycistronic.
c. Both prokaryotic and eukaryotic RNA is monocistronic.
d. Eukaryotic mRNA is generally monocistronic while prokaryotic mRNA is polycistronic.
2. Which of the following statements about leading and lagging strand synthesis is correct?
a. The lagging strand can only be synthesized once the leading strand has been completed
b. Lagging strand is synthesized is continuously while leading strand is synthesized fragment by fragment.
c. Leading strand is synthesized is continuously while lagging strand is synthesized fragment by fragment.
d. Okazaki fragments are used to synthesize the leading and lagging strands of DNA.
3. An intron of a gene had a G to T mutation on the 3’ splice site. What will happen
to this intron?
a. The intron will not be spliced out but will not be recognized in the ribosome during translation.
b. The intron will not be spliced out and will be translated.
c. The exon adjacent to that mutated intron will be skipped and spliced out.
d. The intron will be spliced out so the mutation has no effect on the gene product.
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