AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the only start codon?
A
ATC
B
AUG
C
Quinney
D
TAC
Explanation: 

Detailed explanation-1: -RNA ring design predetermines AUG as initiation codon. This is the only explanation yet for AUG as start codon. RNA ring design determines additional RNA ring gene-and tRNA-like properties described previously, because it presumably mimics constraints on life’s primordial RNAs.

Detailed explanation-2: -The standard start codon is AUG. The standard stop codon is UAG, UGA and UAA. Usually codes for methionine. It terminates the amino acid coding sequence.

Detailed explanation-3: -ATG and AUG denote sequences of DNA and RNA respectively that are the start codon or initiation codon encoding the amino acid methionine (Met) in eukaryotes and a modified Met (fMet) in prokaryotes.

Detailed explanation-4: -The standard start codon for translation of a gene is “AUG, ” which encodes the amino acid methionine (Met or M), and establishes the reading frame for the ribosome to follow, adding corresponding amino acids in a polypeptide chain.

Detailed explanation-5: -There are many varieties of codons that can be used as start codons in bacteria. Some of these include (ATG, TTG, GTG, CTG, etc).

There is 1 question to complete.