Question 1

Hemoglobin transports oxygen in the blood and consists of a chain of 146 amino acids.How many different types of amino acids are used to construct proteins?

Accepted Answer

A)  2
B)  20
C)  146
D)  200E) C) and D)
F) A) and D)

Question 2

The nitrogenous base that is only found in DNA and not in RNA is: rev: 02_22_2014_QC_45858

Accepted Answer

A)  cytosine.
B)  uracil.
C)  adenine.
D)  thymine.E) B) and C)
F) None of the above

Question 3

These biological compounds are non-polar and insoluble in water:

Accepted Answer

A)  proteins
B)  nucleic acids
C)  lipids
D)  carbohydratesE) A) and D)
F) A) and B)

Question 4

Yogurt contains galactose and glucose, which are generated when bacterial enzymes act on milk sugars.What is the main source of the galactose in yogurt?

Accepted Answer

A)  Maltose
B)  Sucrose
C)  Lactose
D)  FructoseE) A) and B)
F) A) and C)

Question 5

The digestive enzyme pepsin works in the acidic environment of the stomach to hydrolyze peptide bonds.As a result, pepsin affects which macromolecule?

Accepted Answer

A)  carbohydrate
B)  protein
C)  DNA
D)  lipidE) B) and D)
F) C) and D)

Question 6

Which amino acid is most soluble in water?

Accepted Answer

A)  Valine
B)  Glycine
C)  Leucine
D)  SerineE) A) and B)
F) None of the above

Question 7

Chitin, a modified form of cellulose, is not only cross-linked with proteins but its glucose units are modified with atoms of:

Accepted Answer

A)  nitrogen.
B)  hydrogen.
C)  oxygen.
D)  sulfur.E) B) and D)
F) A) and B)

Question 8

α\alphaα  - glucose is present in potatoes and  β\betaβ  - glucose is present in wood.Both are glucose molecules but one can be used by humans to synthesize ATP and one cannot.Based on this information, what is the best explanation on why humans can only digest one of the glucose types?

Accepted Answer

A)   α\alphaα  - glucose and  β\betaβ  - glucose are stereoisomers with OH groups oriented differently.
B)   α\alphaα  - glucose is C6H12O6 and  β\betaβ  - glucose is C5H12O6.
C)  Only  α\alphaα  - glucose can form polysaccharides.
D)   α\alphaα  - glucose is a chain and  β\betaβ  - glucose is a ring. E) B) and C)
F) A) and C)

Exam 3: The Chemical Building Blocks of Life

Chitin, a modified form of cellulose, is not only cross-linked with proteins but its glucose units are modified with atoms of:

Correct Answer
verified

The digestive enzyme pepsin works in the acidic environment of the stomach to hydrolyze peptide bonds.As a result, pepsin affects which macromolecule?

Correct Answer
verified

Hemoglobin transports oxygen in the blood and consists of a chain of 146 amino acids.How many different types of amino acids are used to construct proteins?

Correct Answer
verified

Yogurt contains galactose and glucose, which are generated when bacterial enzymes act on milk sugars.What is the main source of the galactose in yogurt?

Correct Answer
verified

The nitrogenous base that is only found in DNA and not in RNA is: rev: 02_22_2014_QC_45858

Correct Answer
verified

These biological compounds are non-polar and insoluble in water:

Correct Answer
verified

$\alpha$ - glucose is present in potatoes and $\beta$ - glucose is present in wood.Both are glucose molecules but one can be used by humans to synthesize ATP and one cannot.Based on this information, what is the best explanation on why humans can only digest one of the glucose types?

Correct Answer
verified

Which amino acid is most soluble in water?

Correct Answer
verified

Exam 3: The Chemical Building Blocks of Life

Chitin, a modified form of cellulose, is not only cross-linked with proteins but its glucose units are modified with atoms of:

Correct AnswerverifiedShow Answer

The digestive enzyme pepsin works in the acidic environment of the stomach to hydrolyze peptide bonds.As a result, pepsin affects which macromolecule?

Correct AnswerverifiedShow Answer

Hemoglobin transports oxygen in the blood and consists of a chain of 146 amino acids.How many different types of amino acids are used to construct proteins?

Correct AnswerverifiedShow Answer

Yogurt contains galactose and glucose, which are generated when bacterial enzymes act on milk sugars.What is the main source of the galactose in yogurt?

Correct AnswerverifiedShow Answer

The nitrogenous base that is only found in DNA and not in RNA is: rev: 02_22_2014_QC_45858

Correct AnswerverifiedShow Answer

These biological compounds are non-polar and insoluble in water:

Correct AnswerverifiedShow Answer

α\alphaα - glucose is present in potatoes and β\betaβ - glucose is present in wood.Both are glucose molecules but one can be used by humans to synthesize ATP and one cannot.Based on this information, what is the best explanation on why humans can only digest one of the glucose types?

Correct AnswerverifiedShow Answer

Which amino acid is most soluble in water?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

$\alpha$ - glucose is present in potatoes and $\beta$ - glucose is present in wood.Both are glucose molecules but one can be used by humans to synthesize ATP and one cannot.Based on this information, what is the best explanation on why humans can only digest one of the glucose types?

Correct Answer
verified

Correct Answer
verified