Multiple Choice Questions ^______^

i)   In amino acids , a zwitterion  is formed when;

A)  The carboxylic group donates a proton to the R group.

B)  A hydrogen from the amino group is lost as proton and accepted by the carboxylic group.

C)  The R group donates a proton to the carboxylic group.

D)  The amino group donates a proton to the R group

E)  A hydrogen from the carboxylic group is lost as a proton and accepted by the amino group.

 

ii)  Which of the Following amino acids have aromatic R groups?

1)  Serine

2)  Phenylalanine

3) Lysine

4) Tyrosine

A)   1,2 and 3 only

B)   1 and 3 only

C)   2 and 4 only

D)  Only 4

E) All are correct

 

iii) Which of the following enzymes is responsible for the splitting in glycolysis?

A)  Aldolase

B)  Enolase

C)  Pyruvate Kinase

D) PFK-1

E) Hexokinase

 

iv)   Which of the following enzymes is the most regulated in glycolysis

A)   Hexokinase

B)   Aldolase

C)   Phospho-fructokinase-1

D)  Enolase

E)  Pyruvate kinase

 

v)  Which of the following organelles contain DNA

1)  Mitochondria

2)  Chloroplasts

3)  Vacuole

4)  Nucleus

A) 1,2,3 only

B) 1 and 2 only

C)  1,2 and 4 only

D) 4 only

E)  All are correct

 

vi)  Which of the following are disaccharides?

1)  Lactose

2)  Sucrose

3) Maltose

4) Fructose

A) 1,2 and 3

B) 1 and 2 only

C)  1,2 and 4 only

D) 4 only

E)  All are correct

 

vii) A zwitterions has a net charge of;

A)  1+

B)  2+

C)  0

D)  1-

E)   2-

 

viii)  The biuret test is used to identify;

A)  Proteins

B)  Amino acids

C)  Carbohydrates

D)  Reducing sugars

E)   None of the above

 

ix)   The Ninhydrin test is used to identify;

A)  Proteins

B)  Amino acids

C)  Carbohydrates

D) Reducing sugars

E)  None of the above

 

x)  What is the net gain during  glycolysis?

A)  2 ATP

B)   4 ATP

C)   2 ATP and NADH

D)  4 ATP and 4 NAD+

E)   4 NADH

 

xi)   Which of the following is not found in animal cells?

A)   Nucleus

B)    Mitochondria

C)    Chloroplast

D)   Rough ER

E)    Cell Membrane

 

xii)   How many irreversible reactions are in the energy investment phase of glycolysis?

A)   2

B)    1

C)    3

D)   0

E)   None of the above

 

xiii)   Which enzyme is used in the 1st priming reaction of glycolysis?

A)  PFK-1

B)   Hexokinase

C)   Aldolase

D)   Enolase

E)   Pyruvate kinase

 

xiv)  How many ATP molecules are used in the energy investment phase of glycolysis?

A)   1

B)    2

C)    3

D)   4

E)   None of the above

 

xv)  Sucrose is a non-reducing sugar?

[] True

[] False

 

xvi) The R group in Glycine is H , a single hydrogen atom.

[] True

[] False

 

xvii) Uncompetitive enzymes bind to the substrate active site.

[]True

[] False

 

xviii) The primary structure of a protein refers to the;

A)  Folding of the structure

B)  Type of bonds holding the protein together

C)  The sequence of amino acids making up the protein

D)  Structure being in an alpha helix or beta pleated sheet

E)   None of the above

 

xix) Which of the following is true about Globular proteins?

1)  They are water soluble.

2)  They function in dynamic roles.

3)   They can function as enzymes.

4)   They have one dominating secondary structure.

A) 1,2 and 3 only

B) 1 and 2 only

C)  2 and 4 only

D)  1 and 3 only

E)   All of the above

 

xx)  Which of the following amino acids is not allowed in an alpha helix?

A) Serine

B) Alanine

C)  Glutamine

D) Glycine

E) Valine

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Posted on March 31, 2013, in Uncategorized and tagged , . Bookmark the permalink. Leave a comment.

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