Quiz 9 2019, questions and answers PDF

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Weekly quiz...

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 Question 1 What enzyme links tRNA to its respective amino acid? Answers: a. Ami noac y lt RNAs y nt het as e

 Question 2 What are the major components required by the cell to translate mRNA into proteins? Correct Answer:

mRNA, ribosome, tRNA, translation initiation and elongation factors, ATP, GTP, amino acids.

 Question 3 The primary structure of a protein is determined by

Answers e. Thesequenceofami noaci ds . :

 Question 4 Present two forms of posttranslational modification of proteins. Give an example of a protein in the body with each. Correct Answer:

Many receptors have glycosylations, many enzymes are called kinases and are adding phosphorylation to other proteins.

 Question 5 The secondary structure of a protein includes ________

hel i xandβpl eat eds heet . Answers α:

 Question 6 Name three differences in translation between prokaryotic and eukaryotic cells. Correct Answer:

formyl methionine in prokaryotes, 7-methylated guanyl and poly adenilated mRNA in eukryotes, ribosomes are different in size and complexity...

 Question 7 Proper protein folding is crucial for its functioning. describe what enables it, what can it cause when it is out of order and provide one example. (use chaperon and prion in your answer). Correct Answer:

Caperons are guiding the correct folding of proteins. the correct folding can be stabilized using post translational modification such as disulfide bridges formation. Misfolded proteins can aggregate and cause severe neurological conditions such as alzheimer's. When such proteins propegate they are called prions and can cause mad cow's disease and equivalent conditions in other mammals.

 Question 8 A base addition occurs early in the coding region of a gene. What type of mutation is it? what does it cause? what would addition of 3 bases cause? Correct Answer: Frame-shift mutation

 Question 9 The term peptidyl transferase relates to Answers c. Pept i debondf or mat i ondur i ngpr ot ei ns y nt hes i s . :...