Biology

26/03/2025

What criteria are used to classify Phylum Porifera? 🐠🐳🌊🐙
A: symetry
B: coelomate
C: scapule
D: protostome

26/03/2025

26/03/2025

Anotomy of brain

26/01/2025

How many bones in axial skeleton

19/07/2023

Structure of virus:
1 The viruses contain:
A) Proteins only
B) DNA only
C) Nucleic acids only
D) Protein,DNA or RNA (nucleic acids)
answer:D
2; Viruses enter plant cells only through:
A; Lenticels
B; Wounds
C; Stomata
D;Roots
Answer: B
3: The genetic material in viruses is:
A; Only RNA
B; Only DNA
C; RNA and DNA both
D; RNA or DNA i.e one nucleic acid in a virus
Answer D
4; A process absent in virus is:
A; Mutation
B; Energy production
C; Replication
D; Protein synthesis
Answer B
5; Genetic transfer through virus is called:
A; Transduction
B; Transformation
C; Conjugation
D; Transposition
Answer: A
6: Capsid is the protective coat of a virus is made up of ……… subunits known as capsomeres:
A; Lipid
B; Protein
C; RNA
D; DNA
Answer: B
7: What is the most effective protection against viral infections:
A; Disinfectants
B; Natural Immunity of the
host
C; Antibiotics
D; Microbistatics
Answer : B
8: Complete viral particle in biology is known as
A; Viroid
B; Virion
C; Virus
D; Venom
Answer : B
9; ………. is structure which is central to viral infectivity:
A; Viral genome
B; Viral Capsid
C; Viral Envelope
D; Viral Coat
Answer : A
10: Between envelope and capsid in HIV ………… layer is present
A; Cell membrane
B; Ribosome complex
C; Matrix layer
D; Glycoprotein spikes
Answer: C

19/07/2023

Classification of virus:

1; influenza virus has got:
A) nacked capsid
B) enveloped capsid
C) nacked polyhedral
D) non of these
answer: B

2; the genetic material in virus is;
A) only RNA
B) only DNA
C) RNA & DNA both
D) RNA or DNA i_ e one nucleic acid in a virus
answer; D

3; wound tumour virus has :
A) Double stranded DNA
B) Double stranded RNA
C) Single stranded DNA
D) Single stranded RNA
answer; B;

4; which of the following is a DNA contain plant virus
A) To***co mosaic virus
B) Cauliflower
C) all of these
D) Non of these
answer B

5; Which one of the following are intracellular obligate parasite
A) Bacteria
B) slime mounds
C) virus
D) blue green algae
answer : C

6; Protein of capsomer is made up of :
A ) Nucleic acids
B) Carbohydrates
C) Fats
D) Amino acids
answer : D

7; Each capsomer of TMV contain acids whose number is:
A) 185
B) 158
C) 518
D) 581
answer: B

8; a virion is a
A) Without protein virus
B) Prions
C) virus
D) Non of these
answer: C

9: Ribovira is a group of viruses which contain
A) dsRNA
B) ssDNA
C) RNA
D) Non of these
answer : C

10; a crytogram has got how many pairs of information
A) 1
B) 2
C) 3
D) 4
answer :D

19/07/2023

Topic: Characteristics of Viruses
1_Viruses are ____parasite
A) unicellular
B) Multicellular
C) Acelluler
D)NOT
Answer C
2-They range in size from20nm to
A)300nm
B)254nm
C)250nm
D)290nm
Answer-C
3- Viruses has another coat then capsid Called
A)Cell wall
B)Wall
C)Evelope
D)NOT
Answer-C
4-Type of reproduction in viruses is
A)Sexual
B) Asexual
C)Spore
D)Fission
Answer -B
5-Evelope of Viruses made up of protein Called
A)Capsomere
B)Karyoten
C) Histone
D)NOT
Answer -A
6-Viruses has only one DNA or RNA as
A) Genome
B)Food
C)NOT
Answer - A
7-Viruse may inactive for indefinite period of time without
A) Reduction
B) Movement
C) Locomotion
D) Replication
Answer -D

8-They don't express vital activities like
A) Respiration
B)Excretion
C) Movement
D)AOT
Answer -D
9-Viruses also contain Some protein which work as ..
A)Alkane
B)Acid
C) Enzyme
D)NOT
Answer-C
10- Viruses is Non living out side of
A) Host
B) Biosphere
C) NoT
Answer -A

19/07/2023

Topic: VIRUSES EITHER LIVING OR NON LIVING

MCQS
(1): A Virus is made up of
A: Protein Coat and nucleic acid
B: Protein Coat and Mitochondria
C: Nucleic acid and cell membrane
D: Nucleic acid,cell wall and cell membrane
Answer: (A)

(2): The Protein coat of viruses that enclose the genetic material is called
A: Virion
B: Capsid
C: Peplomers
D: Capsomers
Answer: (B)

(3): Which Of the following is Genome of the Virus?
A: DNA
B: RNA
C: DNA and RNA
D: DNA or RNA
Answer: (D)

(4): Which of the following is the largest Virus?
A: Megavirus Chilensis
B: Arbo Virus
C: Herpes Virus
D: Mumps Virus
Answer: (A)

(5): Which of the following is a helical virus?
A: TMV
B: T4 Phage
C: Poxivirus
D: Herpes Virus
Answer : (A)

(6): Virus replicate like
A: Inactive
B: Living Organisms
C: Functioning
D: DNA or RNA
Answer : (B)

(7): Viruses Also contain some proteins which work as
A: Enzyme
B: Living organisms
C: Non-living organisms
D: A.O.T
Answer : (A)

(8): Which organisms viruses interact genetically and physiologically
A: Living organisms
B: Enzymes
C: Host organisms
D: N.O.T
Answer : (C)

(9): Which rays can harm Viruses?
A: X-Rays
B: Gamma Rays
C: Reffrected Rays
D: Ultraviolet Rays
Answer : (D)

(10): Which organelles they lack?
A: Molecular
B: Harmfully
C: Cellular
D: A.O.T
Answer: (C)