NET Biology MCQs

DNA polymerase can follow the fork continuously on the leading template.
Synthesis still proceeds 5′ to 3′.

Its template orientation requires repeated short segments.
Ligase later joins these fragments.

RNA polymerase copies one DNA strand into RNA.
In eukaryotes, transcription occurs mainly in the nucleus.

RNA polymerase binds near a gene and builds an RNA strand.
It uses complementary ribonucleotides.

RNA uses uracil instead of thymine.
Uracil pairs with adenine.

MRNA contains codons specifying amino-acid sequence.
It is translated by ribosomes.

TRNA has an anticodon and an amino-acid attachment site.
It matches amino acids to mRNA codons.

Hydrogen bonding produces specific pairing.
This complementarity supports accurate replication.

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.