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Match the following and choose the most appropriate option: (each option on both columns can be matched to multiple option on the another side ie right or left) eg. A-1,2 ; B,C,D-3 ; A,B,C-3,4

A. virus 1. protects the nucleic acid.
B. viruses that infect plants 2.infectious
C. viruses that infect animals 3.single stranded RNA
D.helical or polyhedral geometric forms 4. double stranded RNA
E.protein coat 5. double stranded DNA
F. genetic material 6. nucleoprotein
7. subunits - capsomeres

( A ) A-2; B-4; C-3,5; D-7; E-1; F-3,4,5
( B ) A-6; B-3; C-3,4,5; D-7; E-1,7; F-2,3,4,5
( C ) A-2; B-4; C-4,5; D-6; E-7; F-3,4,5
( D ) A-6; B-3; C-3,4; D-7; E-1; F-2,3,4,5

1 Answer

(B) is the right answer.

A virus is a nucleoprotein and the genetic material is infectious. In general, viruses that infect plants have single stranded RNA and viruses that infect animals have either single or double stranded RNA or double stranded DNA. Bacterial viruses or bacteriophages (viruses that infect the bacteria) are usually double stranded DNA viruses (Figure 2.6b). The protein coat called capsid made of small subunits called capsomeres, protects the nucleic acid. These capsomeres are arranged in helical or polyhedral geometric forms.
answered Apr 2, 2014 by pady_1

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