Textbook Question
How many amino acids are coded in the DNA segment:
CTC–ATA–CGA–TTC–AAG–TTA?
(a) 18
(b) 9
(c) 6
(d) 3
12
views
3. Energy & Cell Processes
Steps of Translation
Struggling with Anatomy & Physiology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
The P site of a ribosome does which of the following?
A
It holds the tRNA that is carrying the next amino acid to be added to the growing polypeptide chain.
B
It helps "unzip" DNA during transcription.
C
It catalyzes the addition of amino acids to the tRNAs.
D
It holds the tRNA carrying the growing polypeptide chain.
Verified step by step guidance1
Understand the structure of a ribosome, which consists of three sites: the A site, P site, and E site.
Recognize the function of each site: the A site holds the tRNA carrying the next amino acid, the P site holds the tRNA with the growing polypeptide chain, and the E site is where tRNAs exit.
Identify the role of the P site specifically: it is responsible for holding the tRNA that carries the growing polypeptide chain during protein synthesis.
Differentiate between the processes of transcription and translation: transcription involves the synthesis of RNA from DNA, while translation involves the synthesis of proteins from mRNA.
Conclude that the P site of the ribosome is involved in translation, not transcription, and its primary function is to hold the tRNA with the growing polypeptide chain.
5:03mWatch next
Master 1) Initiation of Translation with a bite sized video explanation from Bruce Bryan
Start learningRelated Videos
Related Practice
Steps of Translation practice set
Problem sets built by lead tutorsExpert video explanations