Pakistan MCQs

Hydrogen bonds join bases across the two DNA strands.
Covalent phosphodiester bonds form each strand's backbone.

DNA is a polymer made of nucleotides.
Each nucleotide contains a sugar, phosphate, and nitrogenous base.

Phosphodiester bonds connect the sugar of one nucleotide to the phosphate of the next.
They form the sugar-phosphate backbone.

DNA contains the five-carbon sugar deoxyribose.
RNA contains ribose instead.

Phosphodiester bonds connect the sugar of one nucleotide to the phosphate of the next.
They form the sugar-phosphate backbone.

DNA contains the five-carbon sugar deoxyribose.
RNA contains ribose instead.

Phosphodiester bonds connect the sugar of one nucleotide to the phosphate of the next.
They form the sugar-phosphate backbone.

Cellular respiration oxidizes fuel molecules.
Most ATP in aerobic cells is produced through oxidative phosphorylation.

Cellular respiration oxidizes fuel molecules.
Most ATP in aerobic cells is produced through oxidative phosphorylation.

The Krebs cycle oxidizes acetyl-CoA.
It produces reduced electron carriers and carbon dioxide.

The Krebs cycle oxidizes acetyl-CoA.
It produces reduced electron carriers and carbon dioxide.

The Krebs cycle oxidizes acetyl-CoA.
It produces reduced electron carriers and carbon dioxide.