Multiple Choice QuestionsTo which of the following flower 'synandrous' condition is found?
Sunflower (Helianthus sp)
Gourd (Cucurbita sp)
Pea (Pisum sativum)
Lemon (Citrus sp)
Which one of the following conditions in chromosome number is called monosomy?
2n + 1
2n + 2
2n - 1
2n - 2
C.
2n - 1
Monosomy is the condition of having a diploid chromosome complement in which one chromosome lacks its homologous partner. Eg, Turner's Syndrome.
In Turner's Syndrome, there is presence of 45 pair of chromosomes,ie, (2n - 1) XO. It occurs only in females. These females do not mature sexually and are sterile. They have Short stature and normal intelligence.
Tetrasomy or 2n + 2 is a form of aneuploid with the presence of four copies of chromosomes.
Trisomy or 2n + 1 is a chromosomal disorder characterised by an additional chromosome. Eg, Down's syndrome, Patau's syndrome etc.
Nullisomy or 2n-2 is a genetic condition involving the lack of both the normal chromosomal pair for a species.
Shorter generation time of E. coli compared to eukaryotes may be explained on the basis of
shape
large surface : volume ratio
presence of cell wall
absence of organelles
Division in a bacterial cell is carried out through
multiple fission
binary fission
budding
plasmotomy
Which one of the following bacterium is used extensively as biopesticide?
Bacillus subtilis
Bacillus thuringiensis
Streptococcus lactis
Lactobacillus acidophilus
Which one among the following is just a cloning plasmid not an expression plasmid?
pBAD-18-Cam
pBCSK
pUC18
pET
'Royal jelly' is secreted from
hypopharyngeal gland
salivary gland
milk gland
integumentary gland
Liver damage caused by excessive drinking of alcohol is called
hepatitis
dematitis
liver cirrhosis
liver diarrhoea
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