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Biology
DNA
Question

What is the relationship between genes, chromosomes and DNA?
  1. A gene is composed of chromosomes and each gene contains many DNA molecules
  2. A chromosome is composed of DNA molecules and each chromosome contains multiple genes
  3. DNA is composed of chromosomes and each DNA molecule contains many genes
  4. A chromosome is composed of many genes and each DNA molecule is made up of many chromosomes
  5. A gene is composed of many DNA molecules which are composed of chromosomes

A
A chromosome is composed of DNA molecules and each chromosome contains multiple genes
B
A gene is composed of chromosomes and each gene contains many DNA molecules
C
DNA is composed of chromosomes and each DNA molecule contains many genes
D
A chromosome is composed of many genes and each DNA molecule is made up of many chromosomes
E
A gene is composed of many DNA molecules which are composed of chromosomes
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Solution
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  • Chromosomes are the structures made up of chromatin. Chromatin is the threads of DNA that get condensed to form chromosomes.
  • Genes are the segments of DNA that code for proteins. Hence, each chromosome is made up of DNA and contains many genes because of segments of DNA.

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Similar Questions
Q1

IS IT TRUE THAT CHROMOSOME CONTAIN GENE and gene contains DNA?

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Q2

Correct the following statements if there is any mistake.

(a) The four nitrogenous bases in the DNA are Guanine, Thiamine, Adrenaline and Cytosine.

(b) Genes are specific sequences of bases on a chromosome.

(c) A nucleotide is composed of a sulphate, a sugar, (pentose) and a nitrogenous base.

(d) Nucleosomes are groups of cysteine molecules surrounded by DNA strands.

(e) If there are 46 chromosomes in a cell, there will be 23 chromatin fibres inside the nucleus during interphase.

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Q3
Select the statements that are true for genes.

i. Genes are specific sequences of nucleotides in a DNA molecule.
ii. A gene does not store information for protein synthesis.
iii. In individuals of a given species, a specific gene is located on a particular chromosome.
iv. Each chromosome has only one gene.
v. Genome identification is the basis of DNA fingerprinting.
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Q4
Describe briefly what is gene,chromosome, and DNA.
within 24 words for each
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Q5
Select the statements that describe characteristics of genes.
(i) Genes are specific sequence of bases in a DNA molecule.
(ii) A gene does not code for proteins.
(iii) In individuals of a given species, a specific gene is located on a particular chromosome.
(iv) Each chromosome has only one gene.
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