Question 1

The relation between amino acid and polypeptide is similar to the relation between ________.

Accepted Answer

A)   nucleotide and nucleic acid
B)   triglycerides and steroids
C)   phospholipid and plasma membrane
D)   glycogen and glucoseE) A) and B)
F) A) and C)

Question 2

Which parts of the amino acids X and Y are involved in the formation of a peptide bond?
X-Y

Accepted Answer

A)   amino group of X and carboxyl group of Y
B)   carboxyl group of X and amino group of Y
C)   carboxyl group of X and side chain of Y
D)   side chains of both X and YE) A) and D)
F) B) and D)

Question 3

A tripeptide has ________.

Accepted Answer

A)   three amino acids and two peptide bonds
B)   three amino acids and three peptide bonds
C)   two amino acids and three peptide bonds
D)   four amino acids and three peptide bondsE) A) and B)
F) A) and C)

Question 4

Which of the following statements is true for lipids?

Accepted Answer

A)   Lipids are true polymers.
B)   Waxes and pigments are not lipids.
C)   Lipids mix poorly with water.
D)   Lipids are true polymers and mix poorly with water.E) A) and B)
F) C) and D)

Question 5

Starch is composed of ________.

Accepted Answer

A)   branched amylopectin and branched amylose
B)   unbranched amylopectin and unbranched amylose
C)   branched amylopectin and unbranched amylose
D)   unbranched amylopectin and branched amyloseE) A) and B)
F) All of the above

Question 6

Starch and cellulose ________.

Accepted Answer

A)   are polymers of glucose
B)   are cis and trans isomers of each other
C)   are used for energy storage in plants and animals
D)   are structural components of the plant cell wallE) C) and D)
F) A) and B)

Question 7

For lipids to be fluid at room temperature, they should have ________.

Accepted Answer

A)   single bonds only
B)   a higher number of glycerol molecules
C)   a higher number of cis double bonds
D)   a longer carbon chainE) All of the above
F) A) and B)

Question 8

Enzymes that break down DNA catalyse the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

Accepted Answer

A)   The two strands of the double helix would separate.
B)   The phosphodiester linkages of the polynucleotide backbone would be broken.
C)   The pyrimidines would be separated from the deoxyribose sugars.
D)   All bases would be separated from the deoxyribose sugars.E) B) and C)
F) A) and B)

Question 9

Which polysaccharide is an important component in the structure of many animals and fungi?

Accepted Answer

A)   chitin
B)   cellulose
C)   amylopectin
D)   amyloseE) B) and D)
F) A) and D)

Question 10

- Which of the following molecules act as building blocks (monomers)  of polypeptides?

Accepted Answer

A)   1, 4, and 6
B)   2, 7, and 8
C)   7, 8, and 13
D)   11, 12, and 13E) All of the above
F) C) and D)

Question 11

Which of the following statements about the 5 end of a polynucleotide strand of RNA is correct?

Accepted Answer

A)   The 5 end has a hydroxyl group attached to the number 5 carbon of ribose.
B)   The 5 end has a phosphate group attached to the number 5 carbon of ribose.
C)   The 5 end has phosphate attached to the number 5 carbon of the nitrogenous base.
D)   The 5 end has a carboxyl group attached to the number 5 carbon of ribose.E) None of the above
F) A) and B)

Question 12

A new organism is discovered in the forests of Costa Rica. Scientists there determine that the polypeptide sequence of haemoglobin from the new organism has 72 amino acid differences from humans, 65 differences from a gibbon, 49 differences from a rat, and 5 differences from a frog. These data suggest that the new organism is more closely related to ________.

Accepted Answer

A)   humans than to frogs
B)   frogs than to humans
C)   rats than to frogs
D)   gibbons than to ratsE) None of the above
F) A) and D)

Question 13

- Which of the following molecules is the pentose sugar found in RNA?

Accepted Answer

A)   1
B)   6
C)   12
D)   13E) A) and D)
F) C) and D)

Question 14

The molecule shown in the figure is a ________.

Accepted Answer

A)   fatty acid
B)   steroid
C)   triacylglycerol
D)   phospholipidE) None of the above
F) B) and C)

Question 15

The central rule of molecular biology states that ________.

Accepted Answer

A)   DNA is transcribed into RNA, which is translated into protein
B)   DNA is translated into protein
C)   DNA is translated into RNA, which is transcribed into protein
D)   RNA is transcribed into proteinE) All of the above
F) A) and D)

Question 16

In carbohydrates, the ratio of hydrogen (H)  to oxygen (O)  is ________.

Accepted Answer

A)   1:1
B)   2:1
C)   3:1
D)   4:1E) C) and D)
F) B) and D)

Question 17

A glycosidic linkage is analogous to which of the following in proteins?

Accepted Answer

A)   an amino group
B)   a peptide bond
C)   a disulphide bond
D)   a β pleated sheetE) None of the above
F) B) and D)

Question 18

Which of the following pairs of base sequences could form a short stretch of a normal double helix of DNA?

Accepted Answer

A)   5′-AGCT-3′ with 5′-TCGA-3′
B)   5′-GCGC-3′ with 5′-TATA-3′
C)   5′-ATGC-3′ with 5′-GCAT-3′
D)   All of these pairs are correct.E) None of the above
F) All of the above

Question 19

Which of the following provides the information necessary to stipulate a protein's 3-D shape?

Accepted Answer

A)   peptide bonds between different amino acids
B)   sequence of amino acids in the polypeptide chain
C)   side chains of various amino acids
D)   number of water molecules in the vicinityE) A) and C)
F) None of the above

Question 20

People who are lactose intolerant cannot extract energy from milk because ________.

Accepted Answer

A)   they are missing an enzyme
B)   lactose is too big to be digested by the enzymes
C)   milk is fermented to a by-product, which cannot be digested
D)   they are missing the bacteria that can digest lactoseE) All of the above
F) C) and D)

Exam 5: The Structure and Function of Large Biological Molecules

- Which of the following molecules is the pentose sugar found in RNA?

Correct Answer
verified

- Which of the following molecules act as building blocks (monomers) of polypeptides?

Correct Answer
verified

A tripeptide has ________.

Correct Answer
verified

Starch and cellulose ________.

Correct Answer
verified

In carbohydrates, the ratio of hydrogen (H) to oxygen (O) is ________.

Correct Answer
verified

For lipids to be fluid at room temperature, they should have ________.

Correct Answer
verified

Which parts of the amino acids X and Y are involved in the formation of a peptide bond? X-Y

Correct Answer
verified

Which of the following statements is true for lipids?

Correct Answer
verified

Which of the following pairs of base sequences could form a short stretch of a normal double helix of DNA?

Correct Answer
verified

Which of the following provides the information necessary to stipulate a protein's 3-D shape?

Correct Answer
verified

Starch is composed of ________.

Correct Answer
verified

The central rule of molecular biology states that ________.

Correct Answer
verified

Enzymes that break down DNA catalyse the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

Correct Answer
verified

Correct Answer
verified

The relation between amino acid and polypeptide is similar to the relation between ________.

Correct Answer
verified

Which polysaccharide is an important component in the structure of many animals and fungi?

Correct Answer
verified

Which of the following statements about the 5 end of a polynucleotide strand of RNA is correct?

Correct Answer
verified

A glycosidic linkage is analogous to which of the following in proteins?

Correct Answer
verified

People who are lactose intolerant cannot extract energy from milk because ________.

Correct Answer
verified

The molecule shown in the figure is a ________.

Correct Answer
verified

Exam 5: The Structure and Function of Large Biological Molecules

- Which of the following molecules is the pentose sugar found in RNA?

Correct AnswerverifiedShow Answer

- Which of the following molecules act as building blocks (monomers) of polypeptides?

Correct AnswerverifiedShow Answer

A tripeptide has ________.

Correct AnswerverifiedShow Answer

Starch and cellulose ________.

Correct AnswerverifiedShow Answer

In carbohydrates, the ratio of hydrogen (H) to oxygen (O) is ________.

Correct AnswerverifiedShow Answer

For lipids to be fluid at room temperature, they should have ________.

Correct AnswerverifiedShow Answer

Which parts of the amino acids X and Y are involved in the formation of a peptide bond? X-Y

Correct AnswerverifiedShow Answer

Which of the following statements is true for lipids?

Correct AnswerverifiedShow Answer

Which of the following pairs of base sequences could form a short stretch of a normal double helix of DNA?

Correct AnswerverifiedShow Answer

Which of the following provides the information necessary to stipulate a protein's 3-D shape?

Correct AnswerverifiedShow Answer

Starch is composed of ________.

Correct AnswerverifiedShow Answer

The central rule of molecular biology states that ________.

Correct AnswerverifiedShow Answer

Enzymes that break down DNA catalyse the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The relation between amino acid and polypeptide is similar to the relation between ________.

Correct AnswerverifiedShow Answer

Which polysaccharide is an important component in the structure of many animals and fungi?

Correct AnswerverifiedShow Answer

Which of the following statements about the 5 end of a polynucleotide strand of RNA is correct?

Correct AnswerverifiedShow Answer

A glycosidic linkage is analogous to which of the following in proteins?

Correct AnswerverifiedShow Answer

People who are lactose intolerant cannot extract energy from milk because ________.

Correct AnswerverifiedShow Answer

The molecule shown in the figure is a ________.

Correct AnswerverifiedShow Answer

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