Genes and Chromosomes

Report 1 / 5

DNA carries genetic materials in an organism.

Which of the following is the correct structure of DNA?

I.		Double-helix

II.		Consists of two polynucleotides that are arranged antiparallel

III.		The nitrogenous bases of two polynucleotides must complement

IV.		Contain ribose sugar

Difficulty Level: Medium

Report 2 / 5

DNA and RNA carry genetic materials in an organism.

Which of the following is correct about DNA and RNA?

	DNA	RNA
(A)	Single strand	Double strand
(B)	Stored in the nucleus	Replicated from DNA
(C)	Nitrogenous base: adenine, uracil, guanine, cytosine	Nitrogenous base: adenine, thymine, guanine, cytosine
(D)	Ribonucleic acid	Deoxyribonucleic acid

Difficulty Level: Medium

Report 3 / 5

Which of the following base-pairing of DNA is correct?

Difficulty Level: Medium

Report 4 / 5

The diagram shows a pair of homologous chromosomes.

Source: pinterest.com

What is P?

(A)		The locus of a genotype

(B)		The locus of a gene

(C)		The locus of dominant allele

(D)		The locus of a recessive allele

Difficulty Level: Hard

Report 5 / 5

Which of the following controls the traits of an organism?

Difficulty Level: Medium