MDCAT Biology Chapter 3 MCQ's Test With Answers

MDCAT Biology Chapter 3 MCQ's Test

Sr. # Questions Answers Choice
1 Viruses can be classified? Morphology Nucleic acid Both of these Symmetry
2 Induction occurs Spontaneously By environmental stimuli Both of these By light
3 During _______, the phage directs the cell's metabolism to produce viral components Adsorption Penetration Induction Sysnthesis
4 If viral DNA gets detached from host chromosome, it is called Initiation Inspiration Induction All of these
5 Lysis occurs after _________ minutes of initial infection by temperate phage 25 40 35 None of these
6 Phage DNA takes control of the host biosynthetic machinery in which? Lytic cylce Lysogeny Both a & b None of these
7 Phage injects which of these into the host cell? RNA DNA Tail core Both a & b
8 Tail core is forced into the cell by contraction of which of the following? Head Tail sheath Collar None of these
9 Tail releases an enzyme called Lysosome Lysozime Lysozyme Ribozyme
10 During attachment weak chemical union is formed between virion and Cell membrane Receptor site Capsule Tail
11 How many tail fibers are there in a phage (T4)? 4 6 8 10
12 Tail fibers are meant for Penetration Replication Release Attachment
13 Adsorption of phage occurs on a receptor site present on which? Host cell wall Host cell membrane Phage All of these
14 First step of life cycle of phage is Adsorption Attachment Both a & b Penetration
15 Head of the T4 phage is Pyramidal Hexagonal prism Both a and b Helical
16 The end of the sheath posses Collar End plate Both a & b Core
17 The structure of the phage _________ is relatively more complex Tail core Head Genome Tail
18 The core present inside the tail of the phage is composed which? DNA RNA Proteins None of these
19 Early researches on bacteriophages were on those who infect? Pseudomonas Rhizobium B. coil E. coil
20 prions are responsible for Cow madness Mysterious muscular disorders Lung disorders Leukemia
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