AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Transcription and translation of a gene composed of 30 nucleotides would form a protein containing no more than ____ amino acids.
A
15
B
25
C
10
D
I’ll take the L cuz I don’t know
Explanation: 

Detailed explanation-1: -The correct answer is (c): three. The mRNA templates contain the code for proteins as nucleotide triplets called codons.

Detailed explanation-2: -Answer and Explanation: In order for a protein with 100 amino acids to be produced, the messenger RNA must at least be 303 nucleotides in length.

Detailed explanation-3: -Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids, the code is degenerate (more than one codon per amino acid, in most cases). The adaptor molecule for translation is tRNA.

Detailed explanation-4: -Definition. A codon is a DNA or RNA sequence of three nucleotides (a trinucleotide) that forms a unit of genomic information encoding a particular amino acid or signaling the termination of protein synthesis (stop signals). There are 64 different codons: 61 specify amino acids and 3 are used as stop signals.

There is 1 question to complete.