Biology Test from Dr Biswas and Biswas for AIPMT : 03 of 10

The linking of antibiotic resistance gene with the plasmid vector became possible with:
DNA ligase
Endonucleases
DNA polymerase
Exonucleases
Which one of the following statements is incorrect about menstruation?
During normal menstruation about 40 ml blood is lost
The menstrual fluid can easily clot
At menopause in the female, there is especially abrupt increase in gonadotropic hormones
The beginning of the cycle of menstruation is called menarche
Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?
Thorn of Bougainvillea and tendrils of Cucurbita-Analogous organs
Nictitating membrane and blind spot in human eye- Vestigial organs
Nephridia of earthworm and Malpighian tubule of Cockroach- Excretory organs
Wings of honey bee and wings of crow -Homologous organs
The chemiosmotic coupling hypothesis of oxidative phosphorilation proposes that adenosine triphosphate (ATP) is formed because:
high energy bonds are formed mitochondrial proteins
ADP is pumped out of the matrix into intermembrane space
a proton gradient forms across the inner membrane
there is a change in the permeability of inner mitochondrial membrane toward adenosine diphosphate (ADP)
Active transport requires
ATP
acetylcholine
ADP
none of these.
Cyclic photophosphorylation forms
ATP
ATP and NADPH
NADPH
Oxygen, ATP and NADPH
Serpentine is extracted from
Rauwolffia
Calendula
Atropa
Aconitum.
Genetic traits are often carried on separate chromosomes. Which of the following genotype represents a dihybrid organism?
TTRR
TtRr
ttrr
ttRr.
Action potential has ------value.
0 to +30 mV
- (20-30) mV
+ (60-70) mV
- (60-70) mV.
Photosynthesis is maximum in
blue light
green light
red light
ultraviolet light.
Translocation of carbohydrates occur as
glucose
fructose
maltose
sucrose.
/
Purple sulphur bacteria
Green sulphur bacteria
Cyanobacteria
Purple non sulphur bacteria.
Number of nuclei present in a common embryo-sac are
6
8
12
24
A population derived from asexual reproduction which consist of genetically identical individuals
deme
clone
aggregate
callus.
A man suddenly sees a tiger. His heart beat goes up, blood pressure increases, etc. Which hormone is released at this time in his body?
Parathormone
Corticoid
Adrenaline
Thyroxine
You met a person who has bulging/protruding eyes, tachycardia and higher body temperature. He is suffering from 
Hyperthyroidism
Acromegaly
Diabetes
Cretinism
Tadpoles can be made to grow in size by
Inhibiting thyroxine hormone
Feeding the eggs of other frogs
Injecting gonadotrophic hormones
Providing them with suitable climatic conditions
AIDS is caused by HIV that principally infects
All lymphocytes
Activator B cells
Cytotoxic T cells
T4 lymphocytes
Endosperm is consumed by developing embryo in the seed of :
Coconut
Castor
Pea
Maize
In humans/ at the end of the first meiotic division, the male germ cells differentiate into the
primary spermatocytes
secondary spermatocytes
spermatids
Spermatogonia
In the DNA molecule_________
the total amount of purine nucleotides and pyrimidine nucleotides is not always equal
there are two strands which run parallel in the 5' —>3' direction
the proportion of Adenine in relation to thymine varies with the organism
there are two strands which run antiparallel-one in 5'—>3' direction and other in 3 '—>5’
Consider the following four measures (a - d) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common (a) Spray with Bordeaux mixture (b) Control of the insect vector of the disease pathogen (c) Use of only disease-free seeds (d) Use of varieties resistant to the disease Which two of the above measures can control the disease?
b and c
a and b
c and d
a and d
The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of :
lignified thick walls
cohesion and adhesion
weak gravitational pull
transpiration pull
The blood calcium level is lowered by the deficiency of:
Parathormone
Thyroxine
Both Calcitonin and Parathormone
Calcitonin
About 70% of total global carbon is found in :
Grasslands
Agroecosystems
Oceans
Forests
Which one of the following is heterosporous?
Dryopteris
Salvinia
Adiantum
Equisetum
/
Caryopsis
Cypsela
Berry
Cremocarp
Who introduced the dwarf Mexican variety of wheat enriched with norin gene?
Koelreuter
Shull
Johanssen
Borlaugh
Modified sweat glands on the eyelid of rabbit are known as
Meibomian gland
Retinal gland
Lacrymal gland
Pituitary gland
Fertilizin is present in
Zygote
Sperm
Egg
Spermatocyte
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• Most of the entrance tests revolve around these tricky questions which are solved here for PMT preparation in particular the AIPMT, AFMC, AIIMS, AMU, BHU, JIPMER and WB JEE. Set apart, the question are exhibited with the help self explanatory figures

Discussion

Syama

very cool

1911 days 5 hours 43 minutes ago

Niharika

parathormone increases the blood calcium level by removing it from the bones. on the other hand its antagonistic hormone calcitonin decreases the blood calcium level by depositing ca back onto the bones

1990 days 7 hours 49 minutes ago

rakesh

a nice one

3154 days 21 hours 8 minutes ago

Dr. SUBROTO BISWAS
Professor/SME/Instructor in Biology (NEET/AIIMS)
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