Multiple Choice QuestionsDivision in a bacterial cell is carried out through
multiple fission
binary fission
budding
plasmotomy
Which of the following two hormones are essential for induced breeding of fishes?
TSH and ACTH
Oestrogen and progesterone
FSH and LH
Vasopressin and oxytocin
Product of sexual reproduction generally generates
longer viability of seeds
prolonged dormancy
new genetic combination leading to variation
large biomass
Which of the following processes was discovered by Lederberg and Tatum (1946)?
Transduction
Transformation
Asexual reproduction
Conjugation
The component of bacteria that retains the crystal violet stain during Gram staining is
O- antigen
lipopolysaccharide
peptidoglycan
cytoplasmic membrane
C.
peptidoglycan
Gram staining is the method of differentiating bacterial species into two large groups, i.e., Gram positive and Gram negative bacteria based on the physical properties of their cell walls.
In the process of Gram staining
- alcohol is used for decolourlisation process. It solubilises lipid but does not solubilise peptidoglycan layer.
As Gram positive bacteria has less lipid percentage as compared to peptidoglycan. Thus, peptidoglycan which does not get solubilised retain the Gram stain and Gram negative bacteria which has thinner peptidoglycan layer cannot retain the Gram stain.
Neoteny refers to
development of gonads
moulting
metamorphosis
retention of larval traits in the adult body
Select the correct statements from the following regarding asexual reproduction.
I. It is slower than sexual reproduction.
II. It involve a single parent.
III. It produces progeny that are genetically identical with the parent.
IV. Clones are the progeny of asexual reproduction
I, II, III, IV
I, II, IV
I, II, III
II, III, IV
Multiplication of genetically identical copies of a cultiver by asexual reproduction is known as
aclonal propagation
clonal propagation
vegetative propagation
polyclonal propagation
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