Multiple Choice Questions
Botany
Q: Against which of the followings does interferon act?
A) Bacterial disease
B) Virus
C) Fungus
D) Snake Venom
Q: The clear scars in agar plate during culturing of bacteria are called:
A) Stains
B) Plaque
C) Phagas
D) Holos
Q: The clear areas, called plaques, are developed in bacterial colonies on agar plate. These areas are due to:
A) Mutants of bacterial cells
B) Transparencies
C) Phage-killed bacterial cells
D) None of these
Q: Which one of the following statements about viruses is correct?
A) Viruses possess their own metabolic system
B) Viruses contain either DNA or RNA
C) Viruses are facultative parasites
D) Viruses are readily killed by antibiotics
Q: Ravi water does not spoilt due to the presence of:
A) Minerals
B) Antibiotics
C) Algae
D) Bacteriophages
Q: Vaccination against small pox was developed by:
A) Louis Pasteur
B) Edward Jenner
C) Alexander Fleming
D) Robert Koch
Q: Pulse polio immunization is being carried out with the aim to:
A) Eradicate polio
B) To control polio
C) To treat polio
D) To prevent polio
Q: Reverse transcriptase is:
A) RNA-dependent DNA polymerase
B) DNA-dependent RNA polymerase
C) DNA-dependent DNA polymerase
D) RNA-dependent RNA polymerase
Q: The enzyme 'reverse transcriptase' is essentially found in:
A) Bacteria
B) Fungi
C) Bacteriophages
D) Retroviruses
Q: Who discovered reverse transcription?
A) Beadle and Tatum
B) Temin and Baltimore
C) Watson and Crick
D) Khorana
Q: Which of the followings is a viral disease?
A) Red rot of sugarcane
B) Leaf roll of potato
C) wilt of cabbage
D) Damping off disease
Q: Who is credited to show that 'viruses are the cause of cancer'?
A) Mendel
B) Khorana
C) Swami nathan
D) Dulbecco
Q: A temperate bacteriophage:
A) Causing complete bursting of the infected bacterial cell after the latent period
B) Does not cause complete bursting of the infected bacterial cell after the latent period
C) Does not cause the death of the infectious bacterial cell but the infected cell causes to divide
D) Does not cause the death of the infected bacterial cell but continues to exist there and this cell divides almost like a normal cell
Q: Coliphage Ø × 174 has:
A) Single-stranded DNA
B) Double-stranded DNA
C) Single-stranded RNA
D) Double-stranded RNA
Q: Which one of the following statements is correct?
A) Viruses are obligate parasites
B) All fungi are pathogenic
C) All algae are eukaryotic
D) Bacteria are always harmful to mankind
Q: Prions are:
A) Infectious nucleic acid
B) Infectious viruses
C) Infectious proteins
D) Infectious nucleoproteins
Q: Acquired Immune Deficiency Syndrome (AIDS) is:
A) The result of inability of the body to produce interferons
B) Characterized by a reduction in the number of T-lymphocytes
C) An autoimmune disease
D) Characterized by a reduction in the number of killer T-cells
Q: Viruses free plants can be produced by:
A) Anther culture
B) Ovule culture
C) Stem tip culture
D) Leaf explants culture
Q: Tobacco mosaic virus (TMV) genes are:
A) Single-stranded DNA
B) Polyribonucleotide's
C) proteinaceous
D) Double-stranded RNA
Q: The genetic material in viruses is:
A) Only RNA
B) Only DNA
C) DNA or RNA
D) Proteins and RNA
Q: Which among the following contains only one type of nucleic acid?
A) Bacteria
B) Yeast
C) Mycoplasma
D) Virus
Q: RNA particles causing symptoms like that of viral disease are known as:
A) Viroid
B) Vira
C) Mycoplasma
D) Virus
Q: Potato spindle tuber disease is caused by:
A) Nematode
B) Viruses
C) Bacterium
D) Viroid
Q: Which of the following is not correct for viruses?
A) They cannot utilize O₂
B) They can grow In dilute surgery solutions
C) They can multiply in host cytoplasm
D) They are made up of nucleic acid and proteins
Q: Antiviral substance produced by animals (or many vertebrates in response to viral infection for resisting the multiplication of viruses) is known as:
A) Virion
B) Antigen
C) Interferon
D) Repressor protein
Q: Viruses can multiply in:
A) All living cells
B) Bacteria only
C) Specific living cells
D) Rotten food
Q: Viruses are:
A) Unicellular organisms
B) Cellular without cell wall
C) Multicellular organisms
D) Non-cellular organisms
Q: Interferons are:
A) Anticancer proteins
B) Antiviral proteins
C) Antibacterial proteins
D) Complex proteins
Q: The action of interferon:
A) Lacks specificity
B) Is only on specific virus
C) Is only on malignant cells
D) Is on influenza and polio viruses
Q: Viruses cannot reproduce on its own because:
A) It cannot reproduce at all
B) It has underdeveloped sex organs
C) It lacks the cellular machinery to use its genetic material
D) None of these
Q: In chromatin, DNA is associated with highly basic proteins called:
A) Histones
B) Non-histones
C) Both 'A' and 'B'
D) None of these
Q: Chromosome complement 2n-1 is called:
A) Monosomy
B) Trisomy
C) Nullisomy
D) Tetrasomy
Q: Phospholipids are:
A) Amphipathic
B) Amphoteric
C) Amorphous
D) Hydrophobic
Q: Linolenic acid is an unsaturated fatty acid and its content is highest in:
A) Coconut oil
B) Cotton oil
C) Groundnut oil
D) Sunflower oil
Q: The organelle associated with photorespiration is:
A) Lysosome
B) Mesosome
C) Peroxisome
D) Glyoxysome
Q: Pigments of photosystem-I are present in:
A) Appressed part of grana
B) Stromal thylakoids
C) Stromal thylakoids and non-appressed part of granal thylakoids
D) None of these
Q: photophosphorylation was discovered by:
A) Arnon
B) Ruben and Kamen
C) Robin Hill
D) Melvin Calvin
Q: Hormone released during stress condition is:
A) Auxin
B) Gibberellin
C) Abscisic acid
D) Ethylene
Q: In CAM plants CO₂ acceptor is:
A) RuBP
B) PEP
C) OAA
D) PGA
Q: Phytochrome in plants is sensitive to:
A) Blue light
B) Green light
C) Red light
D) Red and far-red light
Q: The source of turpentine is:
A) Sunflower
B) Cycas
C) Pinus
D) Glycine
Q: In coralloid roots Cycas has:
A) Anabaena
B) Azotobacter
C) Rhizobium
D) Mycorrhiza
Q: Female gametophyte of Angiosperms is mostly:
A) 7 celled
B) 8 celled
C) 11 celled
D) Multicelled
Q: The enzyme concerned with transfer of electrons from one substance to another is:
A) Desmolase
B) Hydrolase
C) Transaminase
D) Dehydrogenase
Q: Heteromorphic alternation of generation is found in:
A) Mucor
B) Spirogyra
C) Rhizopus
D) Selaginella
Q: Stamens found in papilionaceae are:
A) One
B) Ten
C) Twenty
D) Infinite
Q: The enzyme that converts glucose into ethyl alcohol is:
A) Diastase
B) Maitase
C) Zymase
D) Invertase
Q: The 'Lock-and-Key model' of an enzyme was proposed by:
A) Robertson
B) Roberts Brown
C) Emil Fischer
D) Daniel Kushland
Q: Phytochrome was discovered by:
A) F.W. Went
B) Garner and Allard
C) F.F. Blackman
D) F.E. Fritsch
Q: The chemical link between Glycolysis and krebs cycle is:
A) Acetyl CoA
B) Pyruvic acid
C) Oxaloacetic acid
D) Citric acid
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