NEET Biology Model Test-7Question No:1
Xylem formed by how many different kinds of elements?
Which of the following is the number of chromosomes present in gamete of rat?
Stomatal apparatus is made of how many components?
How many carpels are present in flower of sem?
Cranial bones are ___ ___ in number.
Select the correct statement from the ones given below
[A] Barbiturates when given to criminals make them tell the truth
[B] Morphine is often given to persons who have under gone surgery as a pain killer
[C] Chewing tobacco lowers blood pressure and heart rate
[D] Cocaine is given to patients after surgery as it stimulates recovery
Which variety of wheat has high protein content?
[B] P 1542
[D] Atlas 66
Find the total number of algae belongs to class phaeophyceae from the following
Volvox, ectocarpus gelidium, dictyota, ficus, laminaria, porphyra, chara, gracilaria, cladophora
Which one of the following statements about all the four of Physalia, obelia, ctenoplana and sea fan is correct?
[A] all are tribloblastic
[B] digestion is both intra cellular and extra cellular
[C] all posses cnidoblast
[D] All are bilaterally symmetrical
The second maturation division of the mammalian ovum occurs
[A] shortly after ovulation before the ovum makes entry into the Fallopian tube
[B] until after the ovum has been penetrated by a sperm
[C] until the nucleus of the sperm has fused with that of the ovum
[D] in the Graafian follicle following the first maturation division
A peculiar odour that prevails in marshy areas and cow-sheds is on account of a gas produced by
[C] slime moulds
[A] an oxygen carrier in human blood
[B] a protein used as food supplement
[C] an oxygen scavenger in root nodules
[D] a plant protein with high lysine content
mRNA directs the building of proteins through a sequence of
‘Balancing selection’ promotes
[D] recessive traits
Primary spermatocyte differs from spermatogonium in
[A] number of chromosomes
[B] size and volume
[C] DNA content
[D] size of chromosomes
The term “hot dilute soup” was used by
[B] von Helmont
[D] Louis Pasteur
Which one of the following animal has pseudocoelome?
In a DNA molecule, the adenine is 1 5%. What will be the percentage of guanine in this DNA?
Which one of the following shows detritus food chain?
[A] Organic waste —> Bacteria —» Mollusc
[B] Grass —»Insects —> Snakes
[C] Plankton —> Small fishes —> Large fishes
[D] All of the above
Match the column
A. Tetracycline—– (i) Inhibits translocation of m RNA along ribosome
B. Chloramphenicol ——(ii) Inhibit interaction between tRNA and m-RNA
C. Erythromycin —— (iii) Inhibit binding amino-acyl tRNA to ribosome
D. Neomycin—- (iv) Inhibit peptidyl transferase
[A] A-i, B-ii, C-iii, D-iv
[B] A-iii, B-iv, C-i, D-ii
[C] A – ii, B – iii, C – iii, D – i
[D] A – iv, B – i, C – ii, D – iii
Darwin judged the fitness of an individual by:
[A] Ability to defend itself
[B] Strategy to obtain food
[C] Number of off springs
[D] Dominance over other individuals
Which type of water is used by the plants?
[A] Gravitational water
[B] Capillary water
[C] Hygroscopic water
[D] Bound water
Industrial melanism is an example of:
[A] Defensive adaptation of skin against UV radiations
[B] Drug resistance
[C] Protective resemblance with the surrounding
[D] Darkening of skin due to industries
Which of the following is a free living nitrogen fixing bacterium present in the soil?
What happens when sperm enters hi secondary oocyte in humans
[A] Breaking of MPF
[B] Turning of APC
[C] Both of above
[D] None of the above
3-PGA is first stable product in
[A] carbon-reduction cycle
[C] Malic acid
Which of the following controls the function of Sertoli cell?
Mode of feeding in free living protozoan is:
[C] Both (a) and (b)
[D] None of these
Protein found in eye lens is:
Most well known natural system of classification of angiosperm was proposed by
[A] Bentham and Hooker
[C] Schleiden and Schwann
[D] Beadle and Tatum
A mere ______ per cent impurities make domestic sewage unfit for human use.
How many parathyroid glands are present in humans?
Administration of progestogens or progestogen-estrogen combination or lUDs within _______ hours(max) of coitus have found to be very effective emergency contraceptives as they could be used to avoid possible pregnancy due to rape or causal unprotected intercourse,
How many petals are present in one flower of Makoi?
Coxal bone is formed by fusion of how many bones?
Select correct statement from the following
A: Wheezing sound is produced hi asthma
B: Emphysema is chronic disorder and one of its major cause is cigarette smoking
C: Pneumotaxic cetre present in medulla
[A] A and B
[B] A and C
[C] B and C
[D] A, B and C
True about Nucleopolyhedrovirus (biocontrol agent)
[A] species-non specific
[B] narrow spectrum
[C] harmful to non target insect also
[D] has negative impact on plant, mammals, birds
The technical term used for the androecium in a flower of Pea (Pisum sativum) is
The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
[A] Fourth month
[B] Fifth month
[C] Sixth month
[D] Third month
Which one of the following does not follow the central dogma of molecular biology?
A germplasm collection is a
[A] Collection of specimens of all the species of an area in a herbarium or botanical garden
[B] Collection of modern varieties of a crop
[C] Collection of plants or seeds having diverse alleles of all genes in a crop
[D] Collection of seeds or pollen of rare and threatened species of a group or area
Stomatal opening is affected by
[A] Nitrogen concentration, carbon dioxide concentration and light
[B] carbon dioxide concentration, temperature and light
[C] nitrogen concentration, light and temperature
[D] carbon dioxide concentration, nitrogen concentration and temperature
[A] connects the two atria in the foetal heart
[B] is a condition in which the heart valves do not completely close
[C] is a shallow depression in the interventricular septum
[D] is a connection between the pulmonary trunk and the aorta in the foetus
Vomiting centre is located in the
[A] medulla oblongata
[B] stomach and sometimes in duodenum
[C] GI tract
In human, cleavage divisions are
[A] slow and synchronous
[B] fast and synchronous
[C] slow and asynchronous
[D] fast and asynchronous