IIT JAM Biotechnology Mock Test 6 - IIT JAM MCQ

A ammeter is a device which should have a small resistance. Therefore, a small resistance should be connected in parallel with the galvanometer.

We know that 

Determinant of all diagonal upper triangular and lower triangular matrices are the product of its diagonal elements.
|A| =abc,  |B| =abc,= |C|=abc
|A| = |B| = |C|

366= 7 x 52 + 2
A leap year contains 366 clay that is. 52 weaks and 2 days.
Rest two days are either (S. M). (M. T). (W. Th). (Th. F). (FL St). (St. S) 
The probability of 53 Sunday or 53 Monday = 3/7

Nitric oxide is a gaseous hormone & has a cytosolic receptor.
Retinoid hormones have nuclear receptors & eicosanoids & insulin have membrane bound receptors.

Cyclooxygenase or Cox is the enzyme that is needed for synthesis of thromboxanes & prostaglandins from arachidonate.

As we know that μ = u_g-K_d where
μ_g= Specific growth rate at instant time
K_d = Death rate constant
μ = Net specific growth rate
As in case of death phase death rate constant is higher than that of growth rate then m that case net specific value must be less than 0. So the relation μ < 0 holds true in case of death phase.

A northern blot is a laboratory method used to detect specific RNA molecules among a mixture of RNA. It can be used to analyze a sample of RNA from a particular tissue or cell type in order to measure the RNA expression of particular genes. Northern blot analysis reveals information about RNA identity, size and abundance, allowing a deeper understanding of gene expression levels.

Plumule is the outgrowth which goes on to form shoot.

I is clockwise in the given configuration.

The part ol seed which goes on to torm the shoot is 
(a) Radicle (b) Plumule (c) Coleoptie
Plumule is the outgrowth which goes on to tonn shoot.

Parallel connection means V₁ = V₂

Electric field inside a hollow charged sphere is zero. Therefore, potential should be constant from r= 0 to

x + l = 0 = > . x = - 1
x² +1 = 0 => no real root exists as _x² is non-negative
x³ +1 = 0 =» x³ = -1 => x = -1
statement I and III are false.

Matrix multiplication is always associative => (AB)C = A(BC)

Two different side otAT-plaiie r-co-ordinate is of opposite sign.

The reflection of a point in XY-plane changes the sign of z -co-ordinate but x and y-co-ordinate remains same. 
The reflection of ( α, β, γ ) ( α, β, –γ )

Fovea centralis or macula lutea is the spot that is rich only in cone cells. Due to cone cells it is point of highest visual acuity and has sharpest colour vision. 

An endospore is a dormant, tough and non-reproductive structure produced by certain bacteria in order to protect themselves from adverse conditions.

Mycoplasmas is a group of bacteria that lack a cell wall around their cell membrane. It is considered as a connecting link between bacteria and virus.

Pleomorphism is the ability of micro-organisms to alter their shape and size in response to environmental conditions.

Pseudopeptidoglycan (also known as pseudomurein  is a major cell wall component of some Archaea that differs from bacterial peptidoglycan in chemical structure, but resembles bacterial peptidoglycan in function and physical structure. The basic components are N-acetylglucosamine and N-acetyltalosaminuronic acid (peptidoglycan has N-acetylmuramic acid instead), which are linked by â-1,3-glycosidic bonds.

Dideoxy derivatives of nucleoside triphosphates (ddNTPs) are used in DNA sequencing, because if one of these molecules is added to a growing DNA chain, synthesis stops. This is because DNA polymerase adds a nucleotide to the 3’-OH of a growing DNA chain and ddNTPs lack the 3’-OH group. Hence, although they can be added to a chain via their 5’-phosphate, the chain is then terminated. In sequencing reaction the fraction of newly synthesized DNA chains that are terminated will depend on the relative proportions of dNTP and ddNTP.

A protein must be purified before its structure and the mechanism of its action can be studied. However, because proteins vary in size, charge and water solubility, no single method can be used to isolate all proteins.

Most of the proteins bind SDS with constant-weight ratio (one SDS molecule per two amino acids) leading to identical charge densities. However, unless proteins are completely unfolded, SDS cannot bind uniformly to protein amino acid residues as some amino acid residues may not be accessible due to folding of protein. Thus reducing agent further denatures the proteins by reducing disulfide linkages and enables SDS to binds the proteins uniformily.

Pollen tube enters the ovary through the micropylar end where synergids are present.