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
D.
Conjugation
Bacterial conjugation is the phenomenon of transfer of genetic material between the bacterial cells with the help of conjugation bridge (tube) or cell to cell contact. This process was firstly discovered by Joshua Lederberg and Edward Tatum in 1946. During conjugation the donor cell provides a conjugative or mobilisable genetic element to the recipient cell.
The component of bacteria that retains the crystal violet stain during Gram staining is
O- antigen
lipopolysaccharide
peptidoglycan
cytoplasmic membrane
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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