AIPMT Biology Model Test

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1. Which one of the following statements is false in respect of viability of mammalian sperm?
sperms must be concentrated in a thick suspension
viability of sperm is determined by its motility
sperm is viable for only up to 24 hours
Survival of sperm depends on the pH of the medium and is more active in alkaline medium
2. In an area where DDT has been used extensively, the population of birds declined significantly because
birds stopped laying eggs
earthworms in the area got eradicated
cobras were feeding exclusively on birds
many of the birds eggs laid, did not hatch
3. Which part would be most suitable for raising virus free plants for micropropagation?
Bark
node
vascular tissue
meristem
4. Pheretima and its close relatives derive nourishment from
soil insects
sugarcane rrots
small pieces of fresh fallen leaves of maize etc.
decaying fallen leaves and soil organic matter
5. Which one of the following is not a part of transcription unit in DNA?
a promoter
the inducer
a terminator
the structural gene
6. A single strand of nucleic acid tagged with a radioactive molecule is called
vector
plasmid
selectable marker
probe
7. Monascus purpureus is a yeast used commercially in the production of
citric acid
ethanol
streptokinase for removing clots from the blood vessels
blood cholesterol lowering statins
8. Which one of the following is not a functional unit of an ecosystem?
energy flow
stratification
productivity
decomposition
9. Anxiety and eating spicy food together in an otherwise normal human, may lead to
vomiting
indigestion
jaundice
diarrhoea
10. Which is true about ribosomes?
the prokaryotic ribosomes are 80S, where S stands for sedimentation coefficient.
therse are composed of ribonucleic acid and proteins
these are found only in eukaryotic cells
these are self splicing introns of some RNAs
11. If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence?
TTAGU
AACTG
UAGAC
CAGAU
12. Nuclear membrane is absent in
Agaricus
Volvox
Nostoc
Pencillium
13. Ribosomal RNA is actively synthesised in
nucloeplasm
lysosomes
ribosomes
nucleolus
14. Which one of the following is correctly matched?
Passive transport of nutrients- ATP
Apoplast- Plasmodesmata
Bakane of rice seedlings - F.Skoog
Potassium- Readily immobilisation
15. Which one of the following areas in India, is a hotspot of biodiversity?
Eastern ghats
Gangetic Plain
Sunderbens
Western ghats
16. A patient brought to a hospital with myocardinal infarction is normally immediately given
Pencillin
Statins
Cyclosporin A
Streptokinase
17. The highest number of species amongst the following in the world is represented by
fungi
algae
lichens
mosses
18. The Leydig cells as found in the human body are secretory source of
glucagon
progesterone
androgens
intestinal mucus
19. Which one is a true statement regarding DNA polymerase used in PCR?
it is isolated from a virus
it remains active at high temperature
it serves as a selectable marker
it is used to ligate introduced DNA in recipient cells.
20. Cirrhosis of liver is caused by the chrnonic intake of
opium
cocain
alcohol
tobacco
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