Cells

Question 1

What are different cell types?

Answer 1

Eukaryotic and Prokaryotic

Question 2

What are Eukrayotic cells?

Answer 2

Has cell membrane and nucleus

Question 3

Centromere

Answer 3

Joining point of chromatids

Question 4

Diploid

Answer 4

Chromosomes in pair

Question 5

Haploid

Answer 5

Chromosomes not in pair

Question 6

What coarries the genetic info for retroviruses

Answer 6

RNA

Question 7

Can a life form exist without DNA?

Answer 7

No. Though retroviruses exists only with RNA, but they become alive only when inside a host.

Question 8

DNA?

Answer 8

Type of nucleic acid. Made up of large number of nucleotides.

Question 9

Nucleotides?

Answer 9

Building block of Nucleic acid.

Question 10

Components of Nucleotide

Answer 10

Nitrogen base, Sugar, Phospate group

Question 11

Types of Nitrogen base?

Answer 11

Purines and Pyrimidines

Question 12

What does Purine contain?

Answer 12

Adinine and Guanine (AG)

Question 13

What does Pyrimidine contain?

Answer 13

Thymine and Cytosine (TC)

Question 14

How are two strands of DNA connected?

Answer 14

Through hydrogen bonds between A&T and also G&C

Question 15

Function of DNA?

Answer 15

Contains genetic info.

DNA synthesises RNA.

Question 16

Where is DNA found?

Answer 16

In nucleus. Also in mitochondria and chloroplast in small quantities.

Question 17

What is a gene?

Answer 17

Gene is a hereditary unit which is made by a segment of DNA.

Question 18

What is cytoplasm?

Answer 18

Fluid outside the nucleus but within the cell membrane.

Question 19

What is nucleoplasm?

Answer 19

Fluid found inside the nucleus.

Question 20

What is RNA?

Answer 20

Single stranded nucleic acid. Made up of phospate, ribose sugar and nitrogen base.
Nitrogen base has Uracil instead of Thymine.

Question 21

Types of RNA.

Answer 21

mRNA, rRNA and tRNA

Question 22

What are Lipids?

Answer 22

A chain of fatty acids. Acts as source of energy if carbohydrate is not present.

Question 23

What is retro virus?

Answer 23

It is an RNA virus (RNA as genetic material) that replicates in a host cell. It uses reverse transcriptase enzyme to produce DNA from its RNA genome, which is reverse of usual pattern (DNA -> RNA), thus retro(backwards)

Question 24

What type of virus cause most of the diseases?

Answer 24

RNA virus causes most of the diseases. Chickenpox and smallpox are the disease caused by DNA virus.

Question 25

What is Mitosis and Meosis?

Answer 25

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