Chapter 1 - Part 7: Protein synthesis

Question 1

How many steps are in protein synthesis?

Answer 1

4

Question 2

Step 1 of Protein synthesis

Answer 2

mRNA molecule carries the code (a cope on DNA’s instruction for protein) out of the nucleus and into the cytoplasm

Question 3

Step 2 of Protein synthesis

Answer 3

The ribosomes in the cytoplasm read the mRNA and code 3 nucleotides at a time, in codons

Question 4

Step 3 of Protein synthesis

Answer 4

Each codon signals the ribosome to add specific amino acid to a growing polypeptide chain

Question 5

Step 4 of Protein synthesis

Answer 5

Proteins may be sent to the endoplasmic reticulum to be modified and packaged for export in a vesicle or used within the cell

Question 6

where does transcription happen?

Answer 6

In the nucleus

Question 7

where does translation happen?

Answer 7

outside of the nucleus

Question 8

a polypeptide chain will always start with

Answer 8

AUG

Question 9

a polypeptide chain will always end with

Answer 9

UAA, UAG, UGA

Question 10

what are the differences between DNA and RNA?

Answer 10

RNA has ribose sugar where as DNA has deoxyribose sugar

The nitrogenous bas thymine is replaced by the base Uracil in RNA

RNA is single stranded, DNA is double

RNA is usually shorter