Which of the following statements is not correct ?
Lysosomes have numerous hydrolytic enzymes.
The hydrolytic enzymes of lysosomes are active under acidic .
Lysosomes are membrane bound structures.
Lysosomes are formed by the process of packaging in the endoplasmic reticulum.
Which of the following statements regarding mitochondria is incorrect ?
Outer membrane is permeable to monomers of carbohydrates, fats and proteins.
Enzymes of electron transport are embedded in outer membrane.
Inner membrane is convoluted with infoldings.
Mitochondrial matrix contains single circular DNA molecule and ribosomes.
answer 2 is correct
Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth :
Pharynx Oesophagus Crop Gizzard Ileum Colon Rectum
Pharynx Oesophagus Gizzard Crop Ileum Colon Rectum
Pharynx Oesophagus Gizzard Ileum Crop Colon Rectum
Pharynx Oesophagus Ileum Crop Gizzard Colon Rectum
From evolutionary point of view, retention of thje female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in :
Which of the following immune responses is responsible for rejection of kidney graft ?
Humoral immune response
Inflammatory immune response
Cell-mediated immune response
Select the incorrect statement:
Male fruit fly is heterogametic.
In male grasshopers,50% of sperms have no sex-chromosome.
In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.
Human males have one of their sex-chromosome much shorter than the other.
Variations caused by mutation, as proposed by Hugo de Vries, are:
random and directional
random and directionless
small and directional
small and directionless
Which of the following is a commercial blood cholesterol lowering agent ?
A gene locus has two alleles ,a. If the frequency of dominant allele is ,then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population ?
The concept of " Omnis cellula -e-cellula" regarding cell division was first proposed by:
What is the fate of the male gametes discharged in the synergid?
One fuses with with the egg other(s) degentrate in the synergid
All fuse with the egg
One fuses with the egg, other(s) fuse with the synergid nucleus.
One fuses with with the egg and other fuses with central cell nuclei
How does steroid hormone influence the cellular activities?
Changing the permeability of the cell membrane
Binding to DNA and forming a gene - hormone complex
Activating cyclic AMP located on the cell membrane.
Using aquaporin channels as secondary messenger
Which of the following pair of organelles does not contain DNA?
Mitochondria and Lysosomes
Chloroplast and Vacuole
Lysosomes and Vacuoles
Nuclear envelope and Mitochondria
Match the following organisms with their respective characteristics:
(a) Pila (i) Flame cells
(b) Bombyx (ii) Comb plates
(c) Pleurobrachia (iii) Radula
(d) Taenia (iv) Malpighian
Select the correct option from the following :
Which of the following contracepative methods do involve a role of hormone?
Lactational amenorrhea, Pills, Emergency contraceptives
Barrier method, Lactional amenorrhea, Pills
CuT, Pills, Emergency contraceptive
Pills, Emergency contraceptives, Barrier method
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for:
making plastic sacks
use as a fertilizer
construction of roads
making tubes and pipes
Which of the follwoing protocols did aim for reducing emissions of chloroflurocarbons into the atmosphere?
Montreal Protocol -
Recognising the deleterious affects of ozone depletion, an international conference treaty, known as the Montreal Protocol, was signed at Montreal (Canada).
In 1987 (effective in 1989) to control the emission of ozone depleting substances. Subsequently many more efforts have been made and protocols have laid down definite roadmaps, separately for developed and developing countries, for reducing the emission of CFCs and other ozone depleting chemicals.
Montreal protocolOption 2)
Kyoto protocolOption 3)
Gothenburg protocolOption 4)
What would be the heart rate of a person if the cardiac output is 5L, blood volume in the ventricls at the end of the diastole is 100mL and at the end of ventricular systole is 50mL?
50 beats per minute
75 beats per minute
100 beats per minute
125 beats per minute
Which of the following can be used as a biocontrol agent in the treatment of plant disease?
Match ColumnI with Column II
Column I Column II
a. Saprophytes i. Symbiotic association of fungi with plant roots
b. Parasite ii. Decomposition of dead organic materials
c. Lichens iii. Living on living plants or animals
d. Mycorrhiza iv. Symbiotic association of algae and fungi
Choose the correct answer from the options given below
a-i, b-ii , c-ii d-iv
a-iii, b-ii, c-i, d-iv
a-ii, b-i, c-iii, d-iv
a-ii, b-iii, c-iv. d-i