AIPMT Biology Test from Dr Biswas and Biswas of BBIPL

Clove oil is extracted from
scaly bud
floral bud
vegetative bud
leaf bud
Seed
A particular trait which is dominant in male if in the next experiment is carried on in female such cross is called
back cross
test cross
reciprocal cross
none of the above crossed with 'aa' the progeny will
Double fertilization was discovered by
Nawaschin
Guinguard
Boveri
Both a and b
AIDS was reported in
Africa
USA
France
India
Which of the following is not a hereditary disease ?
Cystic fibrosis
Thalassaemia
Haemophilia
Cretinism
Hemophilia is more commonly seen in human males than in human females because
A greater proportion of girls die in infancy
This disease is due to a Y-linked recessive mutation
This disease is due to an X-linked recessive mutation
This disease is due to an X-linked dominant mutation
Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness?
Morphine
Amphetamines
Valium
Hashish
Antibodies in our body are complex
Glycoproteins
Lipoproteins
Steroids
Prostaglandins
What is true about the isolated small tribal populations?
There is a decline in population as boys marry girls only from their own tribe
Hereditary diseases like colour blindness do not spread in the isolated population
Wrestlers who develop strong body muscles in their life time pass this character on to their progeny
There is no change in population size as they have a large gene pool
Human insulin is being commercially produced from a transgenic species of:
Escherichia
Mycobactenum
Rhizobium
Saccharomyces
Thermococcus, Methanococcus and Methanobacterium exemplify:
Archaebacteria that contain protein homologous to eukaryotic core histones
Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
Bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
Bacteria that contain a cytoskeleton and ribosomes
A competitive inhibitor of succinic dehydrogenase is
Malonate
Oxaloacetate
a ketoglutarate
Malate
Vacuole in a plant cell :
is membrane-bound and contains storage proteins and lipids
is membrane-bound and contains water and excretory substances
lacks membrane and contains air
lacks membrane and contains waterand excretory substances
Sex of the child is determined by
male chromosome
female chromosome
size of egg
size of sperm.
Sympatric isolation is which type of behavior?
Geographical isolation
Reproductive isolation
Mimicry
Parasitism.
Co-discoverer of Darwinism was
Galton
Buffon
Malthus
Wallace.
Mechanism of uric acid excretion in a nephron is of
osmosis
Diffusion
Secretion
Ultrafiltration
Malathion, parathion belong to group of
triazines
carbamates
Pyrethenoids
organophosphates
When AABbCC are selfed, what is the phenotypic segregation ratio in F2 generation?
9:3:3:1
3:1
27:9:9:3:3:3:1
1:1
1:1 represents
reciprocal cross
test ratio
monohybrid ratio
trihybrid ratio
Skin color inheritance in man is an example of
pleiotropy
monogenic inheritance
polygenic inheritance
multiple alleles
Epistasis
Linked genes________
must be immediately adjacent to one another on chromosome
have alleles that assort independently of one another
never show crossing over
are on the same chromosome.
always have multiple alleles.
In the F2 generation of a dihybrid cross
four phenotypes appear in linked condition
four phenotypes appear in the ratio 9:3:3:1 if the loci are unlinked
two phenotypes appear in the ratio 3:1 if the loci are unlinked
three phenotypes appear in the ratio 1:2:1 if the loci are unlinked.
two phenotypes appear in the are linked. ratio 1:1 whether or not the loci
The sex of a honeybee is determined by
ploidy, the male being haploid
X and Y chromosomes, the male being XY
X and Y chromosomes, the male being XX
The number of X chromosomes, the male being XO
Z and W chromosomes, the male being ZZ.
In epistasis
nothing changes from generation to generation
one gene alters the effect of another.
a portion of a chromosome is deleted
a portion of a chromosome is inverted
the behavior of two genes is entirely independent.
The phenotype of an individual
depends at least in part on the genotype.
is homozygous
determines the genotype.
is the genetic constitution of the organism
is either monohybrid or dihybrid.
Which statement about alleles is not true?
They are different forms of the same gene.
There may be several at one locus
One may be dominant over another
They may show incomplete dominance
They occupy different loci on the same chromosome
Which statement about a test cross is not true ?
It tests whether an unknown individual is homozygous or heterozygous
The test individual is crossed with a homozygous recessive individual
If the test individual is heterozygous, the progeny will have a l : l ratio
If the test individual is homozygous, the progeny will have a 3:1 ratio.
Test cross results are consistent with Mendel's model of inheritance.
Traits that are coded for in autosomes but expressed only in one sex due to effect of sex -hormones are
sex-Linked
sex-limited
sex-Influenced
none above
A couple each carries the allele for phenylketonuria ; neither of them has disease ; the probability of their child having disease is
0.25
0.50
0.75
1.00
Rh -ve individuals are
homozygous dominant
heterozygous
homozygous recessive
possess only one gene R or r