biology Question Bank - Sarthaks eConnect

Which of the following is the most common cause of trisomy and mental retardation in children?

Allantois in human is responsible for?

Which one of the following layer does not surround the microsporangium?

Monarch butterfly is highly distasteful to its predator because:

(a) New species of bacteria can evolve within few days.

(b) Adaptive ability is inherited

(c) Fitness is the end result of the ability to adapt and get selected by nature

(d) Fitness is based on characteristics which are inherited.

Choose the correct option:

Which is not the function of glucocorticoids?

Liver is the largest gland and is associated with various functions, Choose one which is not correct:

Which of the following sugar is non-reducing?

A person living at high altitudes for year become more and more acclimatized to the low `PO_2` by the following except:

According to the ICBN tautonyms are:

Read the following statements carefully and select the correct option:

(A) Source of the restriction enzyme Hind III is Haemophilus influenzae

(B) In biolistic method of gene transfer, microparticles made up of gold or tungsten are coated with foreign DNA

(C) Micro-injection method for injecting recombinant DNA is used for animal cell.

(D) Primers are chemically synthesized Oligonucleotides that are complementary to the regions of DNA in PCR

How many of the above statement are correct?

Saheli- oral contraceptive pill is a?

An exotic species introduced from another country becomes a serious pest due to:

Some species colonise an area and their population become more numerous where as populations of their species decline or even disappear. This change occurs during:

Which of the following is not an evidence from biogeographical distribution?

The following given diagram is of internal ear labbled the A to D and Choose the correct option.

Choose the correct combination of A to E carbon compounds in the substrate molecules involve in T.C.A cycle:

	A	B	C	D	E
(1)	4C	6C	5C	4C	4C
(2)	6C	5C	4C	3C	2C
(3)	2C	5C	6C	4C	4C
(4)	4C	6C	4C	4C	5C

Consider the following statement about biomolecules:

(I) Primary structure of protein may be branched

(II) Carbohydrates are polyhydroxy derivatives of aldose or ketose sugar.

(III) Proteins are heteropolymers of beta amino acids

(IV) lecithin is an example of phospholopid

(V) Phospholipids are amphipathic

Consider the following diagram and select correct option:

(i) Sycon

(ii) Euspongia

(iii) Spongilla

In few plants peculier, un common fragrance and taste is present. It is related with:

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