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What Are Alleles?

Chromosomes a...

Question

Chromosomes are made up of DNA and . The functional units of DNA are called .

A

chromatin

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B

genes

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C

lipids

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D

proteins

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Solution

The correct option is D proteins

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Question 3
Chromosomes are made up of

(a) DNA
(b) Protein
(c) DNA and proteins
(d) RNA

Q. Read the following statements:

i. Chromosomes are responsible for genetic inheritance.

ii. Chromosomes are made up of DNA which is responsible for the replication and division of daughter cells.

Complete the following sentences by choosing the appropriate words from the brackets.

(Inheritance, sexual reproduction, asexual reproduction, chromosomes, DNA, RNA, gene)

a. Hereditary characters are transferred from parents to offsprings by ............, hence they are said to be structural and functional units of heredity.

b. Organisms produced by ............ show minor variations.

c. The component which is in the nuclei of cells and carries the hereditary characteristics is called .............

d. Chromosomes are mainly made up of .............

e. Organisms produced through ............ show major variations.

The functional segments of DNA are called ___ .

Q. Fill in the blanks:
(i) DNA replicates in the ................. of the cell cycle.
(ii) Chromatin fibre is made up DNA and ................. .
(iii) There are two nucleic acids ................. and ................. .
(iv) DNA acts as director of ................. synthesis.
(v) DNA strands are made up of, pentose sugar and four types of ................. bases.

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