Nucleotide Check

Nucleic acids are polymer of nucleotide monomeric unit. Each nucleotide consists of

• base - sugar-OH

• base - sugar-phosphate

• (base - sugar-Phosphate)x2

• sugar - phosphate

The sugar molecule present in nucleotide is

• triose

• tetrose

• pentose

• hexoes

Which of the following nucleotide contains only ribose sugar and not deoxyribose

• Thymine-pentose sugar- phosphate

• Uracil-pentose sugar- phosphate

• Adenine-pentose sugar- phosphate

• Cytosine-pentose sugar- phosphate

Which of the following statements are true

• the bases in nucleotides are attached to carbon one of sugar molecule

• Sugar components of nucleotide is glucose

• the phosphate group imparts positive charge on nucleotide

Building blocks of nucleic acids are

• nucleotide

• nucleoside

• sugar

• amino acids

One strand of DNA has a sequence 5'-CGCATG-3' the complementary strand would be

• 5'-CGCATG-3'

• 5'-GCGTAC-3'

• 3'-GCGTAC-5'

• 5'-GCGUAC-3'

Which protein holds DNA in nucleus

• histone

• glycoprotein 120

• glycoprotein 140

• keratin

Identify the purine base of nucleic acids in the following.

• Cytosine

• Thymine

• Adenine

• Uracil

What is the relationship among DNA, a gene, and a chromosome?

• A chromosome contains hundreds of genes, which are composed of DNA.

• A chromosome contains hundreds of genes, which are composed of protein.

• A gene contains hundreds of chromosomes, which are composed of protein.

• A gene is composed of DNA, but there is no relationship to a chromosome.

Which sentence is FALSE?

• All organisms have 23 pairs of DNA.

• DNA is made out of 4 nucleotides: adenine, cytosine, thymine, guanine

• Chromosomes are made of genes.

• DNA Is the recipe of life