Question 1

Starch and cellulose are polysaccharides made up long chains of glucose linked by glycosidic bonds.Despite the identical composition,why can humans digest starch but not cellulose?

Accepted Answer

Glucose and cellulose differ in the type...

Question 2

Which of the following statements concerning RNA is/are correct?
1) Retroviruses use RNA for storage of genetic information.
2) RNA can catalyze some reactions.
3) Translation of tRNA produces a protein.

Accepted Answer

A)   1 only
B)   2 only
C)   3 only
D)   1 and 2
E)   1 and 3

Question 3

What is the role of tRNA in protein synthesis?

Accepted Answer

tRNA shuttles the correct amino acid to ...

Question 4

Which of the following statements concerning protein synthesis is/are correct?
1) Protein synthesis occurs in the ribosomes.
2) tRNA moves mRNA to the ribosome.
3) mRNA is cleaved more rapidly than DNA.

Accepted Answer

A)   1 only
B)   2 only
C)   3 only
D)   1 and 2
E)   1 and 3

Question 5

Classification of a compound as a lipid is based on the ___ of the compound.

Accepted Answer

A)   polarity
B)   pH
C)   size
D)   hydrophilicity
E)   solubility

Question 6

What is the functional group corresponding to a peptide bond?

Accepted Answer

A)   amine
B)   ether
C)   amide
D)   hemiacetal
E)   carboxylic acid

Question 7

Which of the following represents the linkage connecting amino acids in proteins?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 8

Which statement concerning the twenty different  α\alphaα -amino acids widely found in nature is true?

Accepted Answer

A)   Each  α\alphaα -amino acid has a different number of carbon atoms.
B)   Each  α\alphaα -amino acid has one amino (-NH2) group.
C)   Each  α\alphaα -amino acid has one carboxylic acid (-COOH) group.
D)   These  α\alphaα -amino acids differ in the R groups attached to the  α\alphaα -carbon.
E)   None of these  α\alphaα -amino acids are aromatic compounds.

Question 9

A polypeptide is

Accepted Answer

A)   an addition polymer of amino acids.
B)   a condensation polymer of amino acids.
C)   a polymer of sugar molecules.
D)   a part of nucleic acids.
E)   a polymer of nucleic acids.

Question 10

Which of the following statements concerning proteins is   not ‾\underline{	ext{ not  }} not ​  correct?

Accepted Answer

A)   Some proteins provide structural support in the form of muscle and collagen.
B)   Some proteins provide storage and transport.
C)   Some proteins regulate chemical reactions that take place in the body.
D)   Some proteins act as catalysts.
E)   Nucleic acids are the building blocks of proteins.

Question 11

How many five membered rings are found in a steroid molecule?

Accepted Answer

A)   
B)   3
C)   4
D)   5
E)   > 5

Question 12

Which of the following concerning protein structure is not correct?

Accepted Answer

A)   The primary structure of a protein is the sequence of amino acids linked together by peptide bonds.
B)   Hydrogen bonds between amide linkages in the protein backbone define protein secondary structure.
C)   Helices and sheets are common tertiary structures in proteins.
D)   How a protein folds into its overall 3-dimensional shape is referred to as the protein tertiary structure.
E)   In cases where more than one polypeptide chain makes up the protein,the interaction of the different chains is referred to as the quaternary structure.

Question 13

Which of the following statements concerning lipids is/are correct?
1) Phospholipids are most prevalent in cell membranes.
2) Triglycerides are formed from fatty acids and glycerol.
3) A major function of lipids in the body is energy storage.

Accepted Answer

A)   1 only
B)   2 only
C)   3 only
D)   1 and 2
E)   1,2,and 3

Question 14

Nonpolar amino acid side chains contain substituents made mostly of what atoms?

Accepted Answer

A)   carbon and hydrogen
B)   nitrogen and oxygen
C)   carbon and nitrogen
D)   carbon and oxygen
E)   nitrogen and hydrogen

Exam 25: Biochemistry

Which of the following concerning protein structure is not correct?

Correct Answer
verified

Which of the following statements concerning protein synthesis is/are correct? 1) Protein synthesis occurs in the ribosomes. 2) tRNA moves mRNA to the ribosome. 3) mRNA is cleaved more rapidly than DNA.

Correct Answer
verified

Which of the following represents the linkage connecting amino acids in proteins?

Correct Answer
verified

Which of the following statements concerning RNA is/are correct? 1) Retroviruses use RNA for storage of genetic information. 2) RNA can catalyze some reactions. 3) Translation of tRNA produces a protein.

Correct Answer
verified

Which of the following statements concerning lipids is/are correct? 1) Phospholipids are most prevalent in cell membranes. 2) Triglycerides are formed from fatty acids and glycerol. 3) A major function of lipids in the body is energy storage.

Correct Answer
verified

A polypeptide is

Correct Answer
verified

Which statement concerning the twenty different $\alpha$ -amino acids widely found in nature is true?

Correct Answer
verified

Starch and cellulose are polysaccharides made up long chains of glucose linked by glycosidic bonds.Despite the identical composition,why can humans digest starch but not cellulose?

Correct Answer
verified
Glucose and cellulose differ in the type...
View Answer

Classification of a compound as a lipid is based on the ___ of the compound.

Correct Answer
verified

Which of the following statements concerning proteins is $\underline{\text{ not }}$ correct?

Correct Answer
verified

What is the functional group corresponding to a peptide bond?

Correct Answer
verified

Nonpolar amino acid side chains contain substituents made mostly of what atoms?

Correct Answer
verified

How many five membered rings are found in a steroid molecule?

Correct Answer
verified

What is the role of tRNA in protein synthesis?

Correct Answer
verified
tRNA shuttles the correct amino acid to ...
View Answer

Exam 25: Biochemistry

Which of the following concerning protein structure is not correct?

Correct AnswerverifiedShow Answer

Which of the following statements concerning protein synthesis is/are correct? 1) Protein synthesis occurs in the ribosomes. 2) tRNA moves mRNA to the ribosome. 3) mRNA is cleaved more rapidly than DNA.

Correct AnswerverifiedShow Answer

Which of the following represents the linkage connecting amino acids in proteins?

Correct AnswerverifiedShow Answer

Which of the following statements concerning RNA is/are correct? 1) Retroviruses use RNA for storage of genetic information. 2) RNA can catalyze some reactions. 3) Translation of tRNA produces a protein.

Correct AnswerverifiedShow Answer

Which of the following statements concerning lipids is/are correct? 1) Phospholipids are most prevalent in cell membranes. 2) Triglycerides are formed from fatty acids and glycerol. 3) A major function of lipids in the body is energy storage.

Correct AnswerverifiedShow Answer

A polypeptide is

Correct AnswerverifiedShow Answer

Which statement concerning the twenty different α\alphaα -amino acids widely found in nature is true?

Correct AnswerverifiedShow Answer

Starch and cellulose are polysaccharides made up long chains of glucose linked by glycosidic bonds.Despite the identical composition,why can humans digest starch but not cellulose?

Correct AnswerverifiedGlucose and cellulose differ in the type...View AnswerShow Answer

Classification of a compound as a lipid is based on the ___ of the compound.

Correct AnswerverifiedShow Answer

Which of the following statements concerning proteins is not ‾\underline{\text{ not }} not ​ correct?

Correct AnswerverifiedShow Answer

What is the functional group corresponding to a peptide bond?

Correct AnswerverifiedShow Answer

Nonpolar amino acid side chains contain substituents made mostly of what atoms?

Correct AnswerverifiedShow Answer

How many five membered rings are found in a steroid molecule?

Correct AnswerverifiedShow Answer

What is the role of tRNA in protein synthesis?

Correct AnswerverifiedtRNA shuttles the correct amino acid to ...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which statement concerning the twenty different $\alpha$ -amino acids widely found in nature is true?

Correct Answer
verified

Correct Answer
verified
Glucose and cellulose differ in the type...
View Answer

Correct Answer
verified

Which of the following statements concerning proteins is $\underline{\text{ not }}$ correct?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
tRNA shuttles the correct amino acid to ...
View Answer