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Question 1 (2 points)

Which is the structure of ATP?

Question 1 options:

A) 

B) 

C) 

D) 

Question 2 (2 points)

3'–TCTCAGAG–5' is the sequence of a newly synthesized DNA segment when the template strand has the sequence 3'–AGAGTCTC–5'.

Question 2 options:

True

False

Question 3 (2 points)

 

The product of the catabolic pathways is different for proteins, triacylglycerols, and carbohydrates.

Question 3 options:

True

False

Question 4 (2 points)

H+ ions generated by reactions in the electron transport chain, as well as H+ ions present in the matrix of the mitochondria, are pumped across the inner mitochondrial membrane into the intermembrane space at three different sites.

Question 4 options:

True

False

Question 5 (2 points)

________ is an mRNA sequence that codes for the dipeptide Cys–Trp.

Question 5 options:

Question 6 (2 points)

A/An ________ mutation is the substitution of one nucleotide for another.

Question 6 options:

Question 7 (2 points)

A ________ is a complex of a single DNA molecule and proteins wrapped tightly together in a bundle.

Question 7 options:

Question 8 (2 points)

By the end of step [4] of the citric acid cycle, ________ carbons are lost as CO2 and ________ molecules of NADH are formed.

Question 8 options:

Question 9 (2 points)

The number of moles of ATP that can be synthesized from ADP using the 750. Calories ingested during a meal is ________ moles.

Question 9 options:

Question 10 (2 points)

The three key elements needed to form recombinant DNA are: a DNA molecule into which a new DNA segment will be inserted; an enzyme that cleaves DNA at specific locations; and an enzyme from a second organism that will be inserted in the original DNA molecule.

Question 10 options:

True

False

Question 11 (2 points)

Which molecule contains the largest amount of stored energy?

Question 11 options:

A) 

B) 

C) 

D) 

Question 12 (2 points)

What polypeptide would be synthesized from the following template strand of DNA: 3' CGG AGA CGG ACG 5'?

Question 12 options:

A) 

Ala–Ser–Ala–Thr

B) 

Arg–Arg–Arg–Cys

C) 

Ala–Ser–Ala–Cys

D) 

Cys–Ala–Ser–Ala

E) 

Gln–Lys–Gln–Met

Question 13 (2 points)

In which stage of catabolism is starch hydrolyzed to glucose with the aid of the enzyme amylase?

Question 13 options:

A) 

Stage [3]

B) 

Stage [2]

C) 

Stage [1]

D) 

Stage [4]

Question 14 (2 points)

During replication, the two strands of DNA separate and each serves as a template for a new strand. Thus, the original DNA molecule forms two DNA molecules, each of which contains one strand from the parent DNA and one new strand.

Question 14 options:

True

False

Question 15 (2 points)

Anabolism is an energy releasing process that involves the synthesis of large molecules from smaller ones.

Question 15 options:

True

False

Question 16 (2 points)

The citric acid cycle is also called the tricarboxylic acid cycle (TCA cycle).

Question 16 options:

True

False

Question 17 (2 points)

 which intermediate in the citric acid cycle is a secondary alcohol?

Question 17 options:

A) 

B) 

C) 

D) 

Two of the intermediates are secondary alcohols.

E) 

Question 18 (2 points)

Which is the major product of stage [2] of catabolism?

Question 18 options:

A) 

NADH

B) 

GTP

C) 

CO2

D) 

Acetyl CoA

Question 19 (2 points)

If the phosphorylation of GMP to form GDP requires 7.3 kcal/mol of energy, what is the energy change associated with the hydrolysis of GDP to form GMP?

Question 19 options:

A) 

–7.3 kcal/mol

B) 

14.6 kcal/mol

C) 

7.3 kcal/mol

D) 

Not enough information is given to determine the change in energy.

Question 20 (2 points)

GTP is a high energy compound.

Question 20 options:

True

False

Question 21 (2 points)

Which codon does not code for alanine?

Question 21 options:

A) 

GCC

B) 

GCU

C) 

GCG

D) 

GAC

E) 

GCA

Question 22 (2 points)

Considering the energy changes associated with the two individual reactions below, what coupled reaction is an energetically favorable one?

Energy change

fructose 1,6-bisphosphate + H2O fructose 6-phosphate + HPO42–

–3.9 kcal/mol

ATP + H2O ADP + HPO42–

–7.3 kcal/mol

Question 22 options:

A) 

ADP + fructose 1,6-bisphosphate ATP + fructose 6-phosphate

B) 

ATP + fructose 6-phosphate ADP + fructose 1,6-bisphosphate

C) 

ATP + H2O ADP + HPO42–

D) 

Fructose 1,6-bisphosphate + H2O fructose 6-phosphate + HPO42–

E) 

ADP + fructose 6-phosphate ATP + fructose 1,6-bisphosphate

Question 23 (2 points)

Which statement about RNA codons is not true?

Question 23 options:

A) 

There are 64 different codons.

B) 

Three codons are "stop" codons, signaling the termination of protein synthesis.

C) 

Three codons are "start" codons, signaling the start of protein synthesis.

D) 

It is possible for two different codons to code for the same amino acid.

Question 24 (2 points)

 which is a genetic disease?

Question 24 options:

A) 

Tay-Sachs disease

B) 

Galactosemia

C) 

Sickle cell anemia

D) 

Huntington's disease

E) 

All of the diseases are genetic diseases.

Question 25 (2 points)

DNA consists of two polynucleotide strands that wind into a left-handed double helix.

Question 25 options:

True

False

Question 26 (2 points)

How many molecules of GTP are produced for each turn of the citric acid cycle?

Question 26 options:

A) 

4

B) 

2

C) 

1

D) 

8

Question 27 (2 points)

Each FADH2 that enters the electron transport chain will result in the formation of ________ units of ATP.

Question 27 options:

A) 

2.5

B) 

10

C) 

1.5

D) 

32

E) 

7.3

Question 28 (2 points)

The cleavage of a protein with chymotrypsin occurs in stage [1] of catabolism.

Question 28 options:

True

False

Question 29 (2 points)

The structure of coenzyme A contains amine and amide functional groups.

Question 29 options:

True

False

Question 30 (2 points)

Which is the sum of all of the chemical reactions that take place in an organism?

Question 30 options:

A) 

Citric acid cycle

B) 

Anabolism

C) 

Catabolism

D) 

Metabolism

Question 31 (2 points)

The primary function of the electron transport chain and oxidative phosphorylation is which of the following?

Question 31 options:

A) 

To oxidize the reduced coenzymes NADH and FADH2, and provide energy for the synthesis of ATP

B) 

To provide electrons and energy for the phosphorylation of ATP

C) 

To synthesize the reduced coenzymes necessary for digestion

D) 

To transport electrons from ATP to ADP, and synthesize acetyl CoA molecules

Question 32 (2 points)

How many molecules of reduced coenzymes are produced for each turn of the citric acid cycle?

Question 32 options:

A) 

2

B) 

4

C) 

32

D) 

16

Question 33 (2 points)

Which choice is a polynucleotide that is a polymer of ribonucleotides?

Question 33 options:

A) 

RNA

B) 

DNA

C) 

Both DNA and RNA

D) 

Neither DNA nor RNA

Question 34 (2 points)

 

Which base is at the 5' end of the structure shown?

Question 34 options:

A) 

Uracil

B) 

Adenine

C) 

Guanine

D) 

Cytosine

E) 

Thymine

Question 35 (2 points)

 

What is a nucleoside?

Question 35 options:

A) 

A monosaccharide + a base + phosphate

B) 

The monosaccharides ribose and deoxyribose

C) 

A polymer of ribonucleotides

D) 

A monosaccharide + a base

Question 36 (2 points)

A nucleoside is formed by joining the anomeric carbon of the monosaccharide with a nitrogen atom of the base.

Question 36 options:

True

False

Question 37 (2 points)

Which base is found in DNA or RNA, but not both?

Question 37 options:

A) 

Uracil

B) 

Guanine

C) 

Cytosine

D) 

Adenine

Question 38 (2 points)

What is the abbreviation of the polynucleotide shown?

Question 38 options:

A) 

CAT

B) 

TAC

C) 

CGT

D) 

TGC

Question 39 (2 points)

Step 7 of the citric acid cycle is shown. Which statement best describes what occurs in this step?

Question 39 options:

A) 

Fumarate undergoes hydrogenation with hydrogens and electrons provided by the enzyme fumarase.

B) 

Fumarate undergoes hydrolysis with the aid of the enzyme fumarase.

C) 

Fumarate undergoes hydration with the aid of the enzyme fumarase.

D) 

Fumarate undergoes reduction with the aid of the cofactor fumarase.

Question 40 (2 points)

What is the complementary strand for the DNA strand 5'–AAGGTAGC–3'?

Question 40 options:

A) 

5'–CGATGGAA–3'

B) 

5'–TTCCATCG–3'

C) 

3'–AAGGTAGC–5'

D) 

3'–TTCCATCG–5'

E) 

3'–CGATGGAA–5'

Question 41 (2 points)

Where does the electron transport chain process take place?

Question 41 options:

A) 

In the intermembrane space of mitochondria

B) 

In the inner membrane of mitochondria

C) 

In the matrix of mitochondria

D) 

In the outer membrane of mitochondria

Question 42 (2 points)

The addition of a phosphate group to ADP, forming ATP, is an example of what type of reaction?

Question 42 options:

A) 

Phosphorylation

B) 

Reduction

C) 

Decarboxylation

D) 

Hydrolysis

E) 

Hydration

Question 43 (2 points)

When the base guanine is added to the 2'-OH of the monosaccharide ribose, the product is guanosine.

Question 43 options:

True

False

Question 44 (2 points)

Nucleic acids are formed by joining the 3'-OH group of one nucleotide with the 5'-phosphate of a second nucleotide in a phosphodiester linkage.

Question 44 options:

True

False

Question 45 (2 points)

Which statement concerning the biomolecules DNA is incorrect?

Question 45 options:

A) 

DNA stores the genetic information of an organism and transmits that information from one generation to another.

B) 

Four common bases are found in DNA: adenine, cytosine, guanine, and thymine.

C) 

DNA stands for diribonucleic acid.

D) 

DNA molecules are located in the nucleus of a cell.

Question 46 (2 points)

The hydrolysis of ATP is an energy-requiring reaction that cleaves one phosphate group, forming ADP and hydrogen phosphate, (HPO42–).

Question 46 options:

True

False

Question 47 (2 points)

Which sequence has a purine base at the 3' end?

Question 47 options:

A) 

GUGCCU

B) 

AUCCT

C) 

TCTAG

D) 

CCTTC

Question 48 (2 points)

The primary structure of a polynucleotide is the sequence of nucleotides that it contains, which is determined by the identity of the bases.

Question 48 options:

True

False

Question 49 (2 points)

polynucleotides are named by the sequence of the bases they contain, beginning at the 3' end and using the one-letter abbreviation for the bases.

Question 49 options:

True

False

Question 50 (2 points)

 NAD+ and FAD are oxidized in the electron transport chain.

Question 50 options:

True

False

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