Bio1332 Biochemistry - Lecture Two - Amino Acids And Proteins
13 Questions
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• Know what an amino acid is. • Appreciate the properties of key amino acids. • Understand what secondary structure is.
Questions and Answers
- 1.Fill in the gaps below:Proteins contribute to the cell in many ways.They work as #_____# to catalyse reactions.They can also work by interacting with RNA and DNA to control nucleic acids, e.g. #_________# factors.Lipid-bound proteins work as #_______# systems.
- 2.Complete the following sentence:The monomeric unit of a protein is an _______________.
- 3.In an amino acid, what is the centre alpha-carbon bound to?
- A.
Amino group, carboxyl group, hydrogen atom, R group
- B.
Amino group, carboxyl group, hydrogen atom, A group
- C.
Amino group, hydroxyl group, hydrogen atom, R group
- D.
Amino group, hydroxyl group, hydrogen atom, A group
- 4.Which group in the amino acid varies, giving each amino acid individuality?
- A.
R group
- B.
Amino group
- C.
Carboxyl group
- D.
Hydrogen atom
- 5.True or False?If a molecule is 'chiral', it means it is identical to / indistinguishable from its mirror form.
- A.
True
- B.
False
- 6.Is the alpha carbon atom chiral?
- A.
Yes
- B.
No
- 7.Name the amino acid that does not have a mirror image.
- 8.In which form are amino acids found?
- A.
Laevus
- B.
Dexter
- C.
Option 3
- D.
Option 4
- 9.Complete the following sentence:Amino acids are _________, meaning they're a neutral molecule containing both a positive and a negative charge.
- 10.How is a polypeptide chain formed?
- A.
From N-terminal to C-terminal
- B.
From C-terminal to N-terminal
- C.
From 5'-3'
- D.
From 3'-5'
- 11.How are the R groups arranged in an alpha-helix secondary structure?
- A.
They all point outwards
- B.
They all point inwards
- C.
They follow the shape of the helix
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