Question 1

An enzyme catalyst is effective because it ________ and ________

Accepted Answer

The answer of An enzyme catalyst is effective because it...

Question 2

Which of the following saccharides, if any, can be found in a nucleic acid?

Accepted Answer

Ribose is a five-carbon monosaccharide that is a component of RNA (ribonucleic acid).

Question 3

Two dipeptides can be produced from the amino acids glycine and alanine. Draw their structures and label the structures with the names of these peptides. The R groups are H for glycine and CH₃ for alanine.

Accepted Answer

The answer of Two dipeptides can be produced from the...

Question 4

What is the substrate in the context of an enzyme-catalyzed reaction?

Accepted Answer

The answer of What is the substrate in the context...

Question 5

Both corn and corn stalks consist of polymers of glucose. The polymer in corn is amylose (starch), and the polymer in corn stalks is cellulose. We eat the corn and convert the amylose to ethanol for use as a fuel, and throw the corn stalks away or feed them to cattle. Why can't we obtain a larger economic benefit from the corn stalks? Mention the difference between amylose and cellulose in your response.

Accepted Answer

The answer of Both corn and corn stalks consist of...

Question 6

Which base is not present in RNA?

Accepted Answer

Thymine is only found in DNA, not RNA. RNA instead contains the base Uracil, which pairs with Adenine. Therefore, option D is the correct answer.

Question 7

Malt is needed to produce good beer. Beer and other liquors are produced by hydrolyzing and fermenting grains such as corn, barley, and wheat. Maltose is a disaccharide produced when starch obtained from grains is hydrolyzed. What are the two saccharides that comprise maltose?

Accepted Answer

The answer of Malt is needed to produce good beer....

Question 8

Describe a triglyceride.

Accepted Answer

The answer of Describe a triglyceride....

Question 9

What monomer is produced when starch is hydrolyzed?

Accepted Answer

The answer of What monomer is produced when starch is...

Question 10

Describe what is meant by the four levels of protein structure: primary, secondary, tertiary, and quaternary.

Accepted Answer

The answer of Describe what is meant by the four...

Question 11

RNA contains the sugar ________ and the base ________.

Accepted Answer

RNA contains the sugar ribose and the base uracil. Deoxyribose and thymine are found in DNA, not RNA. Fructose is a monosaccharide commonly found in fruit, and is not a component of nucleic acids.

Question 12

Which type of noncovalent interaction supports the double helix of DNA and produces the base pairings A-T and G-C?

Accepted Answer

Hydrogen bonding is responsible for the base pairing in DNA. Specifically, three hydrogen bonds form between guanine and cytosine, while two hydrogen bonds form between adenine and thymine.

Question 13

Name and describe the four levels of protein structure, and identify the bonds and forces that determine each.

Accepted Answer

The answer of Name and describe the four levels of...

Question 14

mRNA and tRNA are responsible for the synthesis of ________

Accepted Answer

mRNA is responsible for carrying the genetic information from DNA to the ribosome, where it is translated into a specific sequence of amino acids by tRNA molecules. This process of translation ultimately leads to the synthesis of proteins.

Question 15

Which one of the following is best associated with nucleic acids?

Accepted Answer

Nucleic acids, such as DNA and RNA, are made up of nucleotides, which consist of a nitrogenous base, a five-carbon sugar (saccharide), and a phosphate group. The phosphate linkages are what connect the nucleotides together to form the backbone of the nucleic acid molecule.

Question 16

DNA contains the sugar ________ and the base ________.

Accepted Answer

DNA contains the sugar deoxyribose and the base thymine.

Question 17

Describe the structural features of an $\alpha$-amino acid.

Accepted Answer

The answer of Describe the structural features of an $\alpha$-amino...

Question 18

Which base is not present in DNA?

Accepted Answer

Uracil is not present in DNA; instead, thymine is the base that is found in DNA.

Question 19

What kind of a bond connects simple sugars to produce polysaccharides?

Accepted Answer

The answer of What kind of a bond connects simple...

Question 20

Use the Henderson-Hasselbalch equation to explain why amino acids have a zwitterion structure at a physiological pH of 7.4. The pK_a values are less than 7 for the carboxylic acid group and greater than 7 for the protonated amino group in an amino acid.

Accepted Answer

The answer of Use the Henderson-Hasselbalch equation to explain why...

Quiz 20: Biochemistry: the Compounds of Life

An enzyme catalyst is effective because it and

Which of the following saccharides, if any, can be found in a nucleic acid?

Two dipeptides can be produced from the amino acids glycine and alanine. Draw their structures and label the structures with the names of these peptides. The R groups are H for glycine and CH₃ for alanine.

What is the substrate in the context of an enzyme-catalyzed reaction?

Which base is not present in RNA?

Malt is needed to produce good beer. Beer and other liquors are produced by hydrolyzing and fermenting grains such as corn, barley, and wheat. Maltose is a disaccharide produced when starch obtained from grains is hydrolyzed. What are the two saccharides that comprise maltose?

Describe a triglyceride.

What monomer is produced when starch is hydrolyzed?

Describe what is meant by the four levels of protein structure: primary, secondary, tertiary, and quaternary.

RNA contains the sugar and the base .

Which type of noncovalent interaction supports the double helix of DNA and produces the base pairings A-T and G-C?

Name and describe the four levels of protein structure, and identify the bonds and forces that determine each.

mRNA and tRNA are responsible for the synthesis of ________

Which one of the following is best associated with nucleic acids?

DNA contains the sugar and the base .

Describe the structural features of an $\alpha$ -amino acid.

Which base is not present in DNA?

What kind of a bond connects simple sugars to produce polysaccharides?

Use the Henderson-Hasselbalch equation to explain why amino acids have a zwitterion structure at a physiological pH of 7.4. The pK_a values are less than 7 for the carboxylic acid group and greater than 7 for the protonated amino group in an amino acid.

Quiz 20: Biochemistry: the Compounds of Life

An enzyme catalyst is effective because it ________ and ________

Which of the following saccharides, if any, can be found in a nucleic acid?

Two dipeptides can be produced from the amino acids glycine and alanine. Draw their structures and label the structures with the names of these peptides. The R groups are H for glycine and CH3 for alanine.

What is the substrate in the context of an enzyme-catalyzed reaction?

Which base is not present in RNA?

Malt is needed to produce good beer. Beer and other liquors are produced by hydrolyzing and fermenting grains such as corn, barley, and wheat. Maltose is a disaccharide produced when starch obtained from grains is hydrolyzed. What are the two saccharides that comprise maltose?

Describe a triglyceride.

What monomer is produced when starch is hydrolyzed?

Describe what is meant by the four levels of protein structure: primary, secondary, tertiary, and quaternary.

RNA contains the sugar ________ and the base ________.

Which type of noncovalent interaction supports the double helix of DNA and produces the base pairings A-T and G-C?

Name and describe the four levels of protein structure, and identify the bonds and forces that determine each.

mRNA and tRNA are responsible for the synthesis of ________

Which one of the following is best associated with nucleic acids?

DNA contains the sugar ________ and the base ________.

Describe the structural features of an α\alphaα -amino acid.

Which base is not present in DNA?

What kind of a bond connects simple sugars to produce polysaccharides?

Use the Henderson-Hasselbalch equation to explain why amino acids have a zwitterion structure at a physiological pH of 7.4. The pKa values are less than 7 for the carboxylic acid group and greater than 7 for the protonated amino group in an amino acid.

An enzyme catalyst is effective because it and

Two dipeptides can be produced from the amino acids glycine and alanine. Draw their structures and label the structures with the names of these peptides. The R groups are H for glycine and CH₃ for alanine.

RNA contains the sugar and the base .

DNA contains the sugar and the base .

Describe the structural features of an $\alpha$ -amino acid.

Use the Henderson-Hasselbalch equation to explain why amino acids have a zwitterion structure at a physiological pH of 7.4. The pK_a values are less than 7 for the carboxylic acid group and greater than 7 for the protonated amino group in an amino acid.