Question 1

In DNA the phosphate groups are on the outside of the helix. Why does this stabilize the structure?

Accepted Answer

A)  ionic interactions with the solvent 
B)  hydrogen bonding with itself 
C)  covalent binding to the solvent 
D)  It does not stabilize the structure. 
A)  ionic interactions with the solvent 
B)  hydrogen bonding with itself 
C)  covalent binding to the solvent 
D)  It does not stabilize the structure.

Question 2

What is the cause of the overall negative charge of a molecule of DNA?

Accepted Answer

A)  hydrogen bonding between base pairs 
B)  the phosphate backbone 
C)  the sugars 
D)  the antiparallel orientation of the DNA 
A)  hydrogen bonding between base pairs 
B)  the phosphate backbone 
C)  the sugars 
D)  the antiparallel orientation of the DNA

Question 3

Which two functional groups are involved in producing a peptide bond?

Accepted Answer

A)  alcohol and amino 
B)  amino and thiol 
C)  methyl and amino 
D)  amino and carboxyl 
A)  alcohol and amino 
B)  amino and thiol 
C)  methyl and amino 
D)  amino and carboxyl

Question 4

Hydrogen bonds form between hydrogen and

Accepted Answer

A)  oxygen. 
B)  helium. 
C)  carbon. 
D)  hydrogen. 
A)  oxygen. 
B)  helium. 
C)  carbon. 
D)  hydrogen.

Question 5

A genome is a set of

Accepted Answer

A)  proteins. 
B)  transcripts. 
C)  genes. 
D)  genetic code. 
A)  proteins. 
B)  transcripts. 
C)  genes. 
D)  genetic code.

Question 6

Look at the bond energies O-H, N-H, and P-H in the table below. O-H is the hardest bond to break because it has the

Accepted Answer

A)  greatest difference in relative affinities of the two atoms for electrons. 
B)  smallest difference in relative affinities of the two atoms for electrons. 
C)  smallest difference in atomic size. 
D)  largest difference in atomic size. 
A)  greatest difference in relative affinities of the two atoms for electrons. 
B)  smallest difference in relative affinities of the two atoms for electrons. 
C)  smallest difference in atomic size. 
D)  largest difference in atomic size.

Question 7

Which six elements make up 97% of the weight of most organisms?

Accepted Answer

Hydrogen, oxygen, ca

Question 8

Which of the following is an example of a metabolic pathway?

Accepted Answer

A)  mitochondria 
B)  organelles 
C)  glycolysis 
D)  plasma membrane 
A)  mitochondria 
B)  organelles 
C)  glycolysis 
D)  plasma membrane

Question 9

The study of biochemistry attempts to explain

Accepted Answer

A)  chemical processes at the atomic level. 
B)  biological processes at the molecular and cellular level. 
C)  the nature of life. 
D)  physical processes at the macromolecular level. 
A)  chemical processes at the atomic level. 
B)  biological processes at the molecular and cellular level. 
C)  the nature of life. 
D)  physical processes at the macromolecular level.

Question 10

The "central dogma of molecular biology" can best be described as the transfer of information between

Accepted Answer

A)  nucleic acids and proteins. 
B)  fatty acids and proteins. 
C)  carboxylic acids and proteins. 
D)  nucleic acids and DNA. 
A)  nucleic acids and proteins. 
B)  fatty acids and proteins. 
C)  carboxylic acids and proteins. 
D)  nucleic acids and DNA.

Question 11

Mutations to proteins typically occur starting

Accepted Answer

A)  at the protein itself. 
B)  with mRNA. 
C)  with tRNA. 
D)  with DNA. 
A)  at the protein itself. 
B)  with mRNA. 
C)  with tRNA. 
D)  with DNA.

Question 12

Name four organelles found in a eukaryotic cell.

Accepted Answer

Many answers are correct inclu

Question 13

Given that methane (CH4) has a bond angle of 109.5 $\degree$ and ethylene (C2H2) has a bond angle of 120 $\degree$, what is the correct bond angle for acetylene (C2H2)?

Accepted Answer

A)  1.5 $\degree$ 
B)  160 $\degree$ 
C)  180 $\degree$ 
D)  360 $\degree$ 
A)  1.5 $\degree$ 
B)  160 $\degree$ 
C)  180 $\degree$ 
D)  360 $\degree$

Question 14

Name the three components of a nucleotide.

Accepted Answer

Nucleotide base, fiv

Question 15

What side products of pyruvate are being converted into alcohol and carbon dioxide by yeast?

Accepted Answer

A)  CO and NADH 
B)  CO2 and NADH 
C)  CO2 and NAD+ 
D)  CO and NAD+ 
A)  CO and NADH 
B)  CO2 and NADH 
C)  CO2 and NAD+ 
D)  CO and NAD+

Question 16

What are the three biochemical principles that together provide a framework for understanding life at the molecular level? How are they interrelated?

Accepted Answer

Hierarchical organization of biochemical

Question 17

The RNA world model is based on the hypothesis that is stable.

Accepted Answer

A)  RNA 
B)  DNA 
C)  uracil 
D)  adenine 
A)  RNA 
B)  DNA 
C)  uracil 
D)  adenine

Question 18

In structures of tRNA, base pairs form between

Accepted Answer

A)  the same strand. 
B)  another strand of RNA. 
C)  a strand of DNA. 
D)  Base pairs do not form. 
A)  the same strand. 
B)  another strand of RNA. 
C)  a strand of DNA. 
D)  Base pairs do not form.

Question 19

List three examples of how biochemistry has made advancements in the lives of many humans.

Accepted Answer

A list can be found in Section

Question 20

The correct definition of a pathway intermediate is a molecule that

Accepted Answer

A)  is both a product and a reactant in a pathway. 
B)  lowers the activation energy of a reaction. 
C)  increases the rate of a reaction. 
D)  is only a reactant in a pathway. 
A)  is both a product and a reactant in a pathway. 
B)  lowers the activation energy of a reaction. 
C)  increases the rate of a reaction. 
D)  is only a reactant in a pathway.

Exam 1: Principles of Biochemistry

In DNA the phosphate groups are on the outside of the helix. Why does this stabilize the structure?

What is the cause of the overall negative charge of a molecule of DNA?

Which two functional groups are involved in producing a peptide bond?

Hydrogen bonds form between hydrogen and

A genome is a set of

Look at the bond energies O-H, N-H, and P-H in the table below. O-H is the hardest bond to break because it has the

Which six elements make up 97% of the weight of most organisms?

Which of the following is an example of a metabolic pathway?

The study of biochemistry attempts to explain

The "central dogma of molecular biology" can best be described as the transfer of information between

Mutations to proteins typically occur starting

Name four organelles found in a eukaryotic cell.

Given that methane (CH4) has a bond angle of 109.5 °\degree° and ethylene (C2H2) has a bond angle of 120 °\degree° , what is the correct bond angle for acetylene (C2H2)?

Name the three components of a nucleotide.

What side products of pyruvate are being converted into alcohol and carbon dioxide by yeast?

What are the three biochemical principles that together provide a framework for understanding life at the molecular level? How are they interrelated?

The RNA world model is based on the hypothesis that is stable.

In structures of tRNA, base pairs form between

List three examples of how biochemistry has made advancements in the lives of many humans.

The correct definition of a pathway intermediate is a molecule that

Physical Biochemistry: Energy Conversion, Water, and Membranes

Nucleic Acid Structure and Function

Protein Structure

Methods in Protein Biochemistry

Protein Function

Enzyme Mechanisms

Cell Signaling Systems

Glycolysis: a Paradigm of Metabolic Regulation

The Citrate Cycle

Oxidative Phosphorylation

Photosynthesis

Carbohydrate Structure and Function

Carbohydrate Metabolism

Lipid Structure and Function

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Metabolic Integration

DNA Replication, Repair, and Recombination

RNA Synthesis, Processing, and Gene Silencing

Protein Synthesis, Posttranslational Modification, and Transport

Gene Regulation

Filters

Given that methane (CH₄) has a bond angle of 109.5 $\degree$ and ethylene (C₂H₂) has a bond angle of 120 $\degree$ , what is the correct bond angle for acetylene (C₂H₂)?