AIPMT 2003

During anaerobic digestion of organic waste,
such as in producing biogas, which one of the
following is left undergraded : -

Gray spots of oat are caused by deficiency of

Boron in green plants assists in

Which one of the following triplet codes, is
correctly matched with its specificity for an
amino acid in protein synthesis or as 'start' or
'stop' codon ?

What would happen if in a gene encoding a
polypeptide of 50 amino acids, 25th codon
(UAU) is mutated to UAA ?

What does "lac" refer to in what we call the lac
operon ?

During transcription, the DNA site at which
RNA polymerase binds is called :-

During translation initiation in prokaryotes, a
GTP molecule is needed in : -

Degeneration of a genetic code is attributed to
the : -

In the genetic code dictionary, how many
codons are used to code for all the 20 essential
amino acids : -

Juicy hair-like structures observed in the lemon fruit develop from

What used to be described as Nissl's granules in a nerve cell are now identified as

Mycorrhiza is an example of :-

Stomata of CAM plants

Which element is located at the centre of the porphyrin ring in chlorophyll?

Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants?

Which one of the following concerns photophosphorylation?

Which one of the following is wrong in relation to photorespiration?

In sugarcane plant 14CO2 is fixed to malic acid, in which the enzyme that fixes CO2 is

Nicotiana sylvestris flowers only during long days and N.tabacum flowers only during short days. If raised in the laboratory under different photoperiods, they can be induced to flower at the same time and can be cross-fertilized to produce...

Differentiation of shoot is controlled by

Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone

Coconut milk factor is

Which one of the following pairs of plants are not seed producers?

Plants reproducing by spores such as mosses and ferns are grouped under the general term

Sexual reproduction in Spirogyra is an advanced feature because it shows

Which one pair of examples will correctly represent the grouping spermatophyta according to one of the schemes of classifying plants?

The genes controlling the seven pea characters
studied by Mendel are now known to be located
on how many different chromosomes ?

In Drosophila, the sex is determined by : -

Pattern baldness, moustaches and beard in
human males are examples of : -

Down's syndrome is caused by an extra copy of
chromosome number 21. What percentage of
offspring produced by an affected mother and a
normal father would be affected by this disorder ?

Which one of the following traits of garden pea
studied by Mendel was a recessive feature ?

Two crosses between the same pair of genotypes
or phenotypes in which the sources of the
gametes are reversed in one cross, is known as : -

Which one of the following conditions though
harmful in itself, is also a potential saviour from
a mosquito borne infectious disease ?

Two opposite forces operate in the growth and
development of every population. One of them
relates to the ability to reproduce at a given rate.
The force opposing it is called : -

Test tube baby means a baby born when

In which one of the following do the two names refer to one and same thing?

In alcohol fermentation

In a flowering plant, archesporium gives rise to

Which one of the following contains the largest
quantity of extracellular material ?

Species are considered as

Biosystematics aims at

Stomata of a plant open due to

When \(m\)-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are)

\(A\) and \(B\) in the following reactions are :

In a set of the given reactions, acetic acid yielded a product C.

Product \(C\) would be

In this reaction :
CH3CHO + HCN \(\to\) CH3CH(OH)CN
           \(\buildrel {HOH} \over \longrightarrow\) CH3CH(OH)COOH
an asymmetric centre is generated. The acid obtained would be

Phospholipids are esters of glycerol with

Chargaff's rule states that in an organism

Glycolysis is