Chapter 5

Question 1

Which of the following is not a polymer? Glucose, starch, RNA or DNA.

Answer 1

Glucose

Question 2

How many molecules of water are released during the polymerization of a 20 monomer long cellulose molecule?

Answer 2

19

Question 3

How do I aldose sugar and ketose Sugar differ?

Answer 3

The position of the carbonyl group

Question 4

Maltos is a disaccharide that can easily be digested into glucose molecules the glycosidic linkage between the glucose molecules, and now those are

Answer 4

Alpha 1-4

Question 5

You want to lose weight which of the following should be a preferred food group?

Answer 5

Cellulose and fructose

Question 6

What is the major structural difference between starch and glycogen?

Answer 6

The amount of benching that occurs in the molecule

Question 7

What is starch composed of?

Answer 7

Branched amylopectin and unbranched Amylose

Question 8

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

Answer 8

Chitin

Question 9

People who are lactose intolerant, cannot extract energy from milk, because

Answer 9

They are missing an enzyme

Question 10

Glycosidic linkage is analogous to which of the following in proteins

Answer 10

A peptide bond

Question 11

Why are cooking oil and gasoline amphipathic molecules?

Answer 11

They do not have a polar or a charged region

Question 12

How do lipids stay fluid at room temperature?

Answer 12

A high number of cis double bonds

Question 13

What does saturated fats contain?

Answer 13

More hydrogen than unsaturated fats that consist of the same number of carbon atoms

Question 14

What component of amino acid structure varies among different amino acids?

Answer 14

The components of the R group

Question 15

What is true about proteins?

Answer 15

Some proteins formal completely 3-D structure only when they interact with their targets

Question 16

Do you have just sequenced a new protein found in mice and observe that sulfur containing cysteine residue occurs at regular intervals. What is the significance of this finding?

Answer 16

Cysteine residues are involved in disulfide bridges that help form tertiary structures

Question 17

What is hemoglobin?

Answer 17

A quaternary protein, with four poly peptide bonds

Question 18

How many heme groups are present in three hemoglobin protein molecules?

Answer 18

12

Question 19

What does sickle cell hemoglobin exhibit?

Answer 19

Altered primary structure and altered quaternary structure. The secondary and tertiary structure is may or may not be altered.

Question 20

Hemoglobin when subjected to 40% acetonitrile a PH 10 loses its quaternary structure, which means that

Answer 20

Four alpha and beta polypeptide dissociate

Question 21

Which of the following provides information necessary to stipulate a proteins 3-D shape

Answer 21

Sequence of amino acids in the polypeptide chain

Question 22

The relationship between amino acid and polypeptide is similar to the relationship between what

Answer 22

Nucleotide and nucleic acid

Question 23

How do RNA and DNA differ

Answer 23

The type of sugar

Question 24

What happens when nucleotides polymerize to form a nucleic acid?

Answer 24

A covalent bond forms between sugar of one nucleotide and phosphate of a second

Question 25

What is true about the five end of a poly nucleotide strand of RNA?

Answer 25

The five and has a phosphate group attach the number five carbon of Ribose

Question 26

What is one of the primary functions of RNA molecules?

Answer 26

Function in synthesis of proteins

Question 27

IF 14 carbon labeled uracil is added to the growth medium of cells what macromolecules will be labeled

Answer 27

RNA

Question 28

What best fits the description of nucleotideS

Answer 28

A nitrogenous base, a phosphate, group, and sugar

Question 29

In an RNA sample

Answer 29

The number of peering may or may not equal the number of and pyrimidine

Question 30

What does central role of molecular biology state?

Answer 30

DNA is transcribed into RNA which is translated into proteins

Question 31

Homo sapiens have 23 pairs of chromosomes. What does this imply

Answer 31

46 double stranded DNA molecules are present in each somatic cell

Question 32

Amylase can break glycostatic linkages between glucose monomers only if the monomers are in the form

Answer 32

Glucose starch, and amylopectin

Question 33

What is true of unsaturated fats?

Answer 33

They have double bonds in their fatty acid chains

Question 34

What structure level of protein least affected by disruption in hydrogen bonding

Answer 34

Primary level

Question 35

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together what would happen to DNA molecules treated with these enzymes

Answer 35

The phosphodiester linkages of the poly nucleotide backbone would be broken