loose one or I matching letters below An Ill swer can be use

loose one or I matching letters below. An Ill swer can be used once, more than once, or not at all. 8h A. May be the genome of a virus B. May be the genome of a eukaryotic cell Genome enke C. May be the genome of a prokaryotic cell Genome of D. May be messenger RNA E. May be either the genome of a virus or the genome of a eukaryotic cell F. May be either the genome of a virus or the genome of a prokaryotic cell G. May be the genome of a virus or mRNA H. None of the above

Solution

Ans. 1. RNA, single stranded, several segments (segmented)

Correct option: D. May be messenger RNA.

During maturation of hn mRNA in eukaryotic cell, the introns are excised off and several exons are joined end-to-end. It can be said that it consists of several segments (exons), it is single stranded, too.

Note: Viruses have RNA as their genome but usually have a single piece of RNA, not segmented RNA.

II. RNA, double stranded, one segment

Correct option: A. May be genome of a virus.

Double stranded RNA is present in some viruses as their genome.

mRNA is always single stranded.

No eukaryotes have RNA as genome.

III. DNA, single stranded, circular

Correct option: A. May be genome of a virus.

Single stranded DNA is present in some viruses as their genome.

NO eukaryotic cell has single stranded DNA either circular or linear as their genome.

All eukaryotes has dsDNA as their genome. For example, plasmid, bacterial chromosomes (both circular), and eukryotic chromosome (linear) are ALWAYS double stranded.

IV. DNA single stranded, linear

Correct option: A. May be genome of a virus.

[see, III]