Questions

Q:

Which of these is NOT a lipid?

A) Wax B) Cholesterol
C) RNA D) Phospholipid
 
Answer & Explanation Answer: C) RNA

Explanation:

RNA is not a lipid among the given options.

 

A lipid is a substance of biological origin that is soluble in nonpolar solvents. It comprises a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, and phospholipids.

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Q:

Birth control pills contain

 

A) Progesterone only B) Estrogen only
C) Mixture of progesterone and estrogen derivative D) Neither progesterone nor estrogen
 
Answer & Explanation Answer: C) Mixture of progesterone and estrogen derivative

Explanation:
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Q:

Why is Meiosis called Reduction Division?

Answer

Meiosis ::


Meiosis is a type of cell division that reduces the chromosome number by half in daughter cells, creating four haploid cells, each genetically distinct from the parent cell that gave rise to them.


Why it is called as Reduction Division ::


1. As the Meiosis division process involves in reduction of chromosome number in the daughter cells to half the number in the parent cell, this process is called Reduction Division.
Meiosis creates gametes (egg and sperm cells).


2. The resulting gametes have 23 new chromosomes, one member of each of the 23 pairs, representing unique combinations of the original maternal and paternal copies.

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Q:

Which reaction occurs spontaneously?

A) Cl2(g) + 2NaF(aq)--> F2(g) + 2NaCl(aq) B) I2(s) + 2NaF(aq)--> F2(g) + 2NaI(aq)
C) Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq) D) I2(s) + 2NaBr(aq)--> Br2(l) + 2NaI(aq)
 
Answer & Explanation Answer: C) Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq)

Explanation:

In this chemical reaction chlorine change oxidation number from 0 to -1 (reduction) and bromine change oxidation number from -1 to 0 (oxidation).

Chlorine is stronger oxidation reagent than bromine.

In VIIA or group 17 (halogen elements) there are six elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At) and tennessin(Ts).

They have high electronegativity because they have seven valence electrons in their outermost energy level, so they can gain an electron to have the octet rule.  

Going down in the group, element are weaker oxidazing reagent and less reactive.

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Q:

The first space rocket to hit the moon was 

A) Apollo II B) Luna 9
C) Lunik 2 D) Zond 5
 
Answer & Explanation Answer: A) Apollo II

Explanation:
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Q:

The tributary of Rriver Indus which flows through Himachal Pradesh is

A) Sutlej B) Beas
C) Ravi D) Hunza
 
Answer & Explanation Answer: A) Sutlej

Explanation:
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Q:

The schwann cell forms a myelin sheath around the

A) nodes of Ranvier B) dendrites
C) nucleus D) axon
 
Answer & Explanation Answer: D) axon

Explanation:

Schwann cells or neurolemmocytes are the cells in the peripheral nervous system that form the myelin sheath around a neuron's axon.

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Q:

Leading communication app Truecaller has tied up with _________ to integrate the tech giant's video calling app Duo within the Truecaller app.

A) Infosys B) Facebook
C) TCS D) Google
 
Answer & Explanation Answer: D) Google

Explanation:

Leading communication app Truecaller has tied up with 'Google' to integrate the tech giant's video calling app Duo within the Truecaller app.

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