Paper Generator

Given below are two statements:
Statement I: Down's syndrome is caused by the absence of one of the X-chromosomes.
Statement II: Turner's syndrome is caused by the presence of an additional copy of the chromosomes.
In the light of the above statements, choose the correct answer from the options given below:

During PCR, primers bind to the DNA strands in the ______ step.

Which of the following are secondary lymphoid organs?
(a) Bone marrow
(b) Tonsils
(c) Spleen
(d) Thymus
Choose the correct answer from the options given below:

Match List-I with List-II.
List-I:
(A) Excess growth hormone
(B) Luteinizing hormone
(C) Vasopressin
(D) Oxytocin
List-II:
(I) Reabsorption of water and electrolytes in kidney
(II) Contraction of uterus during child birth
(III) Acromegaly
(IV) Ovulation
Choose the correct answer from the options given below:

Which of the following statements are Correct?
(a) Energy flow from producers to consumers is unidirectional
(b) Energy pyramid can never be inverted
(c) Transfer of energy follows the 1% law
Choose the correct answer from the options given below :

Natural selection can lead to
(a) stabilisation
(b) genetic drift
(c) directional change
(d) disruption
Choose the correct answer from the options given below :

How many theca are present in each lobe of a typical bilobed angiosperm anther?

Given below are two statements:
Statement I: Plasmids are autonomously replicating DNA.
Statement II: Plasmids are extrachromosomal DNA.
In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following enzymes synthesizes precursor of mRNA, the heterogeneous nuclear RNA (hnRNA)?

If the diploid chromosome number of typical angiosperm is 36, what would be the chromosome number in its endosperm?

Match List-I with List-II.
List-I:
A. Both species are harmed
B. One species is harmed and the other is benefited
C. Both species are benefited
D. One is benefited while the other has no effect
List-II:
I. Predation
II. Mutualism
III. Competition
IV. Commensalism
Choose the correct answer from the options given below:

Which of the following is the correct order of arrangement of vertebrate column from the head to toe?

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The logistic growth model of populations is considered more realistic than the exponential growth model.
Reason R: Resources are finite.
In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following statements about the reabsorption process in Henle's loop are correct?
(a) The descending limb of Henle's loop is permeable to water but almost impermeable to electrolytes.
(b) Urine gets concentrated in Henle's loop.
(c) Reabsorption of $Na^{+}$ and water takes place in Henle's loop.
(d) Active or passive transport of electrolytes occurs in the ascending limb of Henle's loop.
Choose the correct answer from the options given below:

Which of the following are primary consumers in a food chain?

Which of the following statements is correct about Plasmodium?

Which of the following hormone is not secreted by human placenta?

Muscle contraction is initiated by a signal sent by the central nervous system by the release of

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Forelimbs of human and bats are homologous.
Reason R: Forelimbs of humans and bats have similar anatomical structure.
In the light of the above statements, choose the most appropriate answer from the options given below.

Consider a population of 10 million cells. Given the per-capita birth rate of 0.002 (per unit time) and the per-capita death rate of 0.002 (per unit time), the expected number of cells after 10 generations is