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Q:

Which one of the following statements regarding histone proteins is correct?

A) Histones are proteins that are present in mitochondrial membrane B) Histones are proteins that are present in nucleus in association with DNA
C) Histones are proteins associated with lipids in the cytosol D) Histones are proteins associated with carbohydrates in the cytosol
 
Answer & Explanation Answer: B) Histones are proteins that are present in nucleus in association with DNA

Explanation:

Histones are highly alkaline proteins found in eukaryotic cell nucleusthat package and order the DNA into structural units called nucleosomes. They are the chief protein components of chromatin, acting as spools around which DNA winds, and playrole in gene regulation.

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Q:

LPG is a mixture of _______.

A) methane and butane B) butane and propane
C) methane and propane D) ethane and propane
 
Answer & Explanation Answer: B) butane and propane

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Q:

Plastic bottles are made of a polymer called PET. The expanded form of PET is

A) Polyethylene terephthalate B) Polyethyl terelene
C) Polyethylene triphosphate D) Polyethyl tetrachloride
 
Answer & Explanation Answer: A) Polyethylene terephthalate

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Q:

The residual attractive or repulsive forces between molecules or atomic groups that do not arise from a covalent bond, or ionic bonds is called _____

A) Neutral Bond B) Non Polar Bond
C) Electro Valence bond D) Van der Walls bond
 
Answer & Explanation Answer: D) Van der Walls bond

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Q:

Which of the following bonds are weakest in nature?

A) Single bond B) Double bond
C) Triple bond D) Hydrogen bond
 
Answer & Explanation Answer: D) Hydrogen bond

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Q:

Which one of the following is a physical change?

A) Burning of coal B) Burning of wood
C) Heating of a platinum crucible D) Heating of potassium chlorate
 
Answer & Explanation Answer: C) Heating of a platinum crucible

Explanation:

In Burning of coal, burning of wood and Heating of Potassium Chlorate there will be some sort of chemical change, but Heating of a Platinum crucible is a physical change.

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Q:

Chemical name of vinegar is

A) Onam B) Pongal
C) Bihu D) Hornbill
 
Answer & Explanation Answer: B) Pongal

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1 1709
Q:

The Chemical formula of Urea is

A) (NH4)2CO2 B) (NH2)CO
C) (NH4)2CO D) (NH2)2CO
 
Answer & Explanation Answer: D) (NH2)2CO

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