BIO415 Email: bbcnoun@gmail.com Whatsapp: 08131667008 BIO415 TMA3 1).11. Which of the following is not major information needed in estimating the size of a viral genome? (A)the triplet code (B)Average size of the nucleic acid (C)Molecular weight (D). Average size of protein Ans: Average size of the nucleic acid 2).Which of the following is not correct about viruses? (A)viruses are acellular (B)they become inert when in contact with living host cell. (C)they possess single type of nucleic acid (D). they use the metabolic machinery of a living host in order to reproduce Ans: they become inert when in contact with living host cell. 3).7. All these symmetries can be found in viruses except ----- (A)Helical Cubic (B)cubic (C)Binal (D)linear Ans: linear 4).4. Virus can only be studied through the aid of an electron microscope that could magnify up to (A)x 500,000 (B)600000 (C). 400,000 (D)200000 Ans: x 500,000 5).9. The HIV virus is a member of which virus family? (A)Birnaviridae (B)Retroviridae (C)Rhaboviridae (D)Toroviridae Ans: Retroviridae 6).The viral particle that is functionally deficient in some aspect of viral replication is called (A)viriods (B)virion (C)infective virus (D)defective virus Ans: defective virus 7).5. Which of the following is not part of chemical component of virus? (A)nucleic acid (B)glucose (C)lipids (D)protein Ans: glucose 8).8. All these viruses are RNA viruses except --------- (A)Adenoviridae (B)Calciviridae (C)Arenaviridae (D)Coronaveridae Ans: Adenoviridae 9).6. Which of the following factors is not a factor considered in the classification of viruses? (A)presence of both DNA and RNA (B)Size and morphology (C). immunologic properties (D)Natural methods of transmissionNatural methods of transmission Ans: presence of both DNA and RNA 10).----- refers to morphological unit seen in the electron microscope on the surface of the icosahedral virus particle (A)Nucleocaspid (B)capsid (C)Capsomers (D)Capsomeres Ans: Capsomers Email: bbcnoun@gmail.com Whatsapp: 08131667008