CBSE Class 11 Biology Quiz | CBSE Class 11 Biology Objective Type Questions & Answers

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Questions
21 virus that can reproduce without killing its host is called:
A lytic virus
B retroactive virus
C temprate virus
D virion

Answer: temprate virus
22 Under ideal condition a bacterial cell divides about every 20 minutes. It takes 200 minutes to fill a culture tube. How much time will it take to fill a test tube of double size.
A 400 minutes
B 220 minutes
C 240 minutes
D 300 minutes

Answer: 220 minutes
23 In blue-green algae nitrogen fixation occurs in specialized cells called:
A Harmogonia
B Akinetes
C Heterocysts
D Zygospores

Answer: Heterocysts
24 Inside photosynthetic bacteria, Chlorophyll is:
A Localized in Chloroplast
B Present inside Mitochondria
C Dispersed in the cytoplasm
D Absent

Answer: Dispersed in the cytoplasm
25 Amino acids are present in the cell wall of:
A Bryophytes
B Fungi
C Bacteria
D Gymnosperms

Answer: Bacteria
26 In lytic life cycle bacterial cell:
A Continues its normal life processes
B Bursts and dies
C Starts division
D Forms endospore

Answer: Bursts and dies
27 They fix atmospheric Nitrogen:
A Virus
B Fungi
C Bacteria
D Both A & B

Answer: Bacteria
28 Common cold is caused by:
A Bacteria
B Viruses
C Fungi
D Plasmodium

Answer: Viruses
29 Viruses belong to the group:
A Prokaryotes
B Eukaryotes
C Monera
D None of these

Answer: None of these
30 They play a role in the making of dairy products:
A Viruses
B Bacteria
C Algae
D Plasmodium

Answer: Bacteria
31 Food can be preserved when pH of the medium is:
A acidic
B basic
C neutral
D none of these

Answer: acidic
32 Which of the following is caused by bacteria?
A Tetanus
B Measles
C Malaria
D Ringworm

Answer: Tetanus
33 DNA replication occurs in which phase of the cell cycle?
A prophase
B interphase
C metaphase
D Telophase

Answer: interphase
34 During mitosis the process of cytoplasmic division is called
A Cytomeiosis
B Cytoplasmosis
C Cytokinesis
D Cytomitosis

Answer: Cytokinesis
35 Which of these studied mitosis in animal cells?
A Strassburger
B Flemming
C Sutton
D Waldeyer

Answer: Flemming
36 Which of these studied mitosis in plant cells?
A Strassburger
B Flemming
C Sutton
D Waldeyer

Answer: Strassburger
37 Which of the following number of molecules of various types of histones form Nucleosome?
A 8
B 20
C 16
D 10

Answer: 8
38 DNA and histones together form a structure called
A Centromeres
B Nucleosome
C Nucleoplasm
D Centriole

Answer: Nucleosome
39 The total chromosome complement of a cell is called
A Karyosome
B Karyokinesis
C Karyogamy
D Karyotype

Answer: Karyotype
40 Which of the following types of chromosomes have arms of equal length?
A Metacentric
B Telocentric
C Acrocentric
D None of these

Answer: Metacentric

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