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Recent questions tagged medium

Fluid mosaic model of biological membranes was proposed by

asked Apr 3, 2014 by pady_1

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Which bond between the carbon and nitrogen exhibits partial double bond character ?

asked Apr 3, 2014 by pady_1

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Flavoproteins in cryptochromes and photolyases also serve as

asked Apr 3, 2014 by pady_1

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If equilibrium constant K'eq of a given chemical reaction is 1.0, the standard free energy change G' o of that reaction is

asked Apr 3, 2014 by pady_1

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Movement of circulating neutrophils into tissues is known as

asked Apr 3, 2014 by pady_1

1 answer

All blood cells arise from which type of cells ?

asked Apr 3, 2014 by pady_1

1 answer

The maturation site for T-lymphocytes is

asked Apr 3, 2014 by pady_1

1 answer

Sickle cell anemia disease molecular basis, is the change of which amino acid residue for a valine at position 6 of the ?-chain ?

asked Apr 3, 2014 by pady_1

1 answer

Antibody found in the blood after antigen stimulation and also has the ability to cross placenta is

asked Apr 3, 2014 by pady_1

1 answer

The disorder, alkaptonuria is caused by the absence of which enzyme ?

asked Apr 3, 2014 by pady_1

1 answer

For the clinical diagnosis of a myocardial infarction, which enzymes are measured ?

asked Apr 3, 2014 by pady_1

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Which compound stabilizes tubulin in microtubules and promotes polymerization?

asked Apr 3, 2014 by pady_1

1 answer

Very low density lipoproteins (VLDLs) transport endogenous triacylglycerols and cholesterol from

asked Apr 3, 2014 by pady_1

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Apoptosis or programmed cell death, is executed by a group of proteases called

asked Apr 3, 2014 by pady_1

1 answer

Name the coenzyme for pantothenic acid and its deficiency disease

asked Apr 3, 2014 by pady_1

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When gram negative bacteria is acted upon by lysozyme, in an isotonic medium, it causes rod shaped bacteria to assume spherical shape. This phenomena is due to

asked Apr 3, 2014 by pady_1

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Virus mediated transfer of the genetic material from one bacterial cell to the other by means of virus particles is called

asked Apr 3, 2014 by pady_1

1 answer

Inositol 1,4,5-trisphosphate (IP3) in cell signaling is referred as

asked Apr 3, 2014 by pady_1

1 answer

cAMP and cGMP are broken down by which enzymes ?

asked Apr 3, 2014 by pady_1

1 answer

During oxidative phosphorylation in mitochondria which of the following takes place ?

asked Apr 3, 2014 by pady_1

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In the first step of fatty acid biosynthesis, the carboxylation of acetyl CoA to fom malonyl CoA is catalyzed by the enzyme acetyl CoA carboxylase, that has _______ as a cofactor.

asked Apr 3, 2014 by pady_1

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If plant cell is immersed in water the water continues to enter the cell untill the

asked Apr 3, 2014 by sreemathi.v

1 answer

When beet root cylinders are washed and then placed in cold water,anthocyanine does not come out.This indicates that most likely the plasma membrane is

asked Apr 3, 2014 by sreemathi.v

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An example of selectively permeable membrane

asked Apr 3, 2014 by sreemathi.v

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When a cell is fully turgid which of the following will be zero

asked Apr 3, 2014 by sreemathi.v

1 answer

In hypertonic solution cell's water potential

asked Apr 3, 2014 by sreemathi.v

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Plasma membrane controls

asked Apr 3, 2014 by sreemathi.v

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Initial absorption of water by root hairs is through

asked Apr 3, 2014 by sreemathi.v

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Root hairs absorbs water from soil when

asked Apr 3, 2014 by sreemathi.v

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DPD is equal to

asked Apr 3, 2014 by sreemathi.v

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A cell is plasmolysed after being kept in hypertonic solution.What will be present between cell wall and plasmalemma?

asked Apr 3, 2014 by sreemathi.v

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Dry seeds when placed in water swell up due to

asked Apr 3, 2014 by sreemathi.v

1 answer

Osmosis involves

asked Apr 3, 2014 by sreemathi.v

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Fresh grapes shall shrink when they are placed in

asked Apr 3, 2014 by sreemathi.v

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Which helps in maintaining form and structure of cell?

asked Apr 3, 2014 by sreemathi.v

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Cell turgidity is caused by

asked Apr 3, 2014 by sreemathi.v

1 answer

Net movement of water is from

asked Apr 3, 2014 by sreemathi.v

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The external solution having less concentration than the cell sap is called

asked Apr 3, 2014 by sreemathi.v

1 answer

The external solution having same concentration as that of cell sap is called

asked Apr 3, 2014 by sreemathi.v

1 answer

Find the sum of $n$ terms of the series $3+7+13+21+31+.............$

asked Apr 2, 2014 by rvidyagovindarajan_1

1 answer

If $S_1,S_2,S_3$ are the sum of $n$ natural numbers,sum of their squares and sum of their cubes respectively then Show that $9S_2^2=S_3(1+8S_1)$

asked Apr 2, 2014 by rvidyagovindarajan_1

1 answer

Find the sum of $n$ terms of the series $0.6+0.66+0.666+......$

asked Apr 2, 2014 by rvidyagovindarajan_1

1 answer

Find the sum of the series $5+55+555+..........$ upto $n$ terms.

asked Apr 2, 2014 by rvidyagovindarajan_1

1 answer

The external solution having more concentration than the cell sap is called

asked Apr 2, 2014 by sreemathi.v

1 answer

The membrane that allows some solute molecules to pass through it and prevent others is called

asked Apr 2, 2014 by sreemathi.v

1 answer

If $a,b,c$ are in A.P., $b,c,d$ are in G.P. and $\large\frac{1}{c},\frac{1}{d},\frac{1}{e}$ are in A.P., then prove that $a,c,e$ are in G.P.$

asked Apr 2, 2014 by rvidyagovindarajan_1

1 answer

Hydrogen bonding is an electrostatic attraction between covalently bonded hydrogen atom of one molecular with highly electronegative atom (N or F or O) of the same molecular or another molecule. or another molecular .It is of two types -(i) Intermolecular hydrogen bonding where molecular association is caused due to interaction of $H-atom$ of one molecular and N or F or 0-atoms of different molecules. (ii) Intramolecular hydrogen bonding where hydrogen bonding occurs between H atom and N or F or O-atom of the same molecule. Intermolecular hydrogen bonding increases the boiling point of the compound and its solubility in water , whereas intramolecular hydrogen bonding decreases the boiling point of the compound and solubility in water. The maximum possible number of hydrogen bonds in which a water molecule can participate is

asked Apr 2, 2014 by meena.p

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:The roots of transpiring plants is directly proportional to relative humidity}\\\text{Reason:Humid air increases the rate of diffusion so that the rate of transpiration increases}\end{array}$

asked Apr 2, 2014 by sreemathi.v

1 answer

Regarding time frame for embryonal & fetal development : Match the following & choose the most appropriate option:

asked Apr 2, 2014 by pady_1

1 answer

Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Most of the water absorbed by the plants is lost by transpiration}\\\text{Reason:Water is not needed for vital activities of plants}\end{array}$

asked Apr 2, 2014 by sreemathi.v

1 answer

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