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Online Biotechnology Test - Biotechnology Test 3

Instruction:
  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
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  • All the best!

Marks : 2/20

Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.
1.
Vectors are
molecules that degrade nucleic acids
molecules that help in replication
molecules that are able to covalently bond to and carry foreign DNA into cells
molecules that protect host cells from invasion by foreign DNA
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Learn more problems on : Recombinant DNA
2.
Which of the following experimental results does not support Mitchell's chemiosmosis theory?
Electron transport in isolated mitochondria was shown to result in acidification of the medium
Addition of dinitrophenol to isolated mitochondria was shown to inhibit electron transport, but had no effect on ATP synthesis
Addition of dinitrophenol to isolated mitochondria during electron transport was shown to inhibit acidification of the medium
An artificial proton gradient across the inner mitochondrial membrane drives ATP synthesis in the absence of electron transport
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Learn more problems on : Plant Structure
3.
Which of the following aid plants in the acquisition of nitrogen from nitrogen gas of the atmosphere?
Bacteria
Algae
Nematodes
Moulds
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Learn more problems on : Nitrogen Fixation and Photosynthesis
4.
When F1 plants are crossed with homozygous recessive plants, it is known as
test cross
recessive cross
criss-cross
para-cross
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Learn more problems on : Plant Genetics
5.
Which of the following growth regulator promote cell division?
Auxins
Cytokinins
Gibberellins
Brassinosteroids
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Learn more problems on : Media Required for Plant Cell Culture
6.
Integrated nopaline T-DNA occurs as
single segment
two segments
three segments
four segments
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Learn more problems on : Gene Transfer in Plants
7.
Which technique is used to introduce genes into dicots?
electroporation
particle acceleration
microinjection
Ti plasmid infection
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Learn more problems on : Gene Transfer in Plants
8.
Bruise resistant tomatoes have been developed by the expression of antisense RNA against
glycerol 1 phosphate acyl transferase
polygalactouranase
ACC deaminase
Sucrose phosphate synthase gene
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Learn more problems on : Transgenic Plant
9.
Plant tissue culture technique is used to select somaclones that are
resistant to herbicide
not resistant to herbicide
resistant to insecticides
not resistant to insecticides
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Learn more problems on : Special Proteins and Crop Improvement
10.
An odd number of cross overs in inverted region will result into formation of a dicentric chromatid and acentric chromatid at anaphase I incase of
pericentric inversion
paracentric inversion
double inversion
none of these
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Learn more problems on : Animal Biotechnology Chromosomes
11.
The cell cycle is controlled in most cells by
time (after a certain length of time the cell divides)
a series of checkpoints
cell size (when the cell reaches a certain size, it divides)
different cells exhibit different control strategies
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Learn more problems on : Cell Cycle
12.
Accumulation of lactate leads to
increase in pH
no change in pH
reduction in the pH of culture hence loss of cell viability
no loss of cell viability
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Learn more problems on : Animal Cell Culture and Regulation
13.
Some types of variation are due to changes in the genetic material. What is this type of change called?
Fertilisation
Mutation
Radiation
Sterilisation
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Learn more problems on : Animal Breeding and Transgenic Animal
14.
An example of mosaic antigen is
virus
bacteria
a hapten
protein
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Learn more problems on : Monoclonal Antibodies
15.
Malting process allows malt amylase and proteinases to degrade starch and protein to
glucose and peptone as well as peptides
glucose and amino acids
maltose and peptone as well as peptides
maltose and amino acids
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Learn more problems on : Beer and Wine
16.
Ales are the beer in which fermentation is carried out using
top yeast
bottom yeast
either of the above
middle yeast
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Learn more problems on : Beer and Wine
17.
Which of the following organism is used for the fermentation of grapes?
Rhizopus sonti
Aspergillus oryzae
Lactobacillus vermiformis
Saccharomyces cerevisiae
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Learn more problems on : Beer and Wine
18.
Which of the following nitrogen sources is added in the fermentation medium of citric acid production?
Ammonium salt
Urea
Both (a) and (b)
Peptone
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Learn more problems on : Vinegar and Citric Acid
19.
Which of the following precursor is added in the medium to get penicillin G?
Phenyl carbamic acid
Phenyl acetic acid
Ammonium sulphate
Ammonium chloride
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Learn more problems on : Antibiotics
20.
At normal pH, penicillin remains in
aqueous phase
solvent phase
both (a) and (b)
precipitates
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Learn more problems on : Antibiotics
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