NET Applied Sciences MCQs

RRNA combines with proteins to form ribosomal subunits.
It helps catalyze peptide-bond formation.

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

Ribosomes read mRNA codons.
TRNAs deliver corresponding amino acids.

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

One strand runs 5′ to 3′ and the other 3′ to 5′.
This orientation is important for replication enzymes.

DNA replication occurs before cell division.
Each daughter DNA molecule contains one old and one new strand.

ATP stores usable energy in phosphate bonds.
Hydrolysis of ATP powers many cellular processes.

Glycolysis breaks glucose into pyruvate.
It occurs in the cytosol and does not directly require oxygen.

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.

Photosynthesis builds carbohydrates from carbon dioxide and water.
Light energy is captured by pigments such as chlorophyll.

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