Question 1

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

Accepted Answer

Hydrogen,oxygen,carb

Question 2

Even though amylose and cellulose contain the same repeating unit of glucose,they are very different in terms of function.Why?

Accepted Answer

A)  A glycosidic bond cannot be cleaved. 
B)  The orientations of the glycosidic bond are different. 
C)  ATP cannot be generated from amylose. 
D)  There is no structural difference between the polymers. 
A)  A glycosidic bond cannot be cleaved. 
B)  The orientations of the glycosidic bond are different. 
C)  ATP cannot be generated from amylose. 
D)  There is no structural difference between the polymers.

Question 3

If you were a biochemist who just discovered a new protein,how would you gain insight into the function of the protein?

Accepted Answer

One way to gain insight into the functio

Question 4

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

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 5

The main difference between deoxyribonucleotides and ribonucleotides is that they have a different

Accepted Answer

A)  number of carbons in the sugar ring. 
B)  functional group on the   carbon. 
C)  number of phosphates on the   carbon. 
D)  functional group on the   carbon. 
A)  number of carbons in the sugar ring. 
B)  functional group on the   carbon. 
C)  number of phosphates on the   carbon. 
D)  functional group on the   carbon.

Question 6

What is another way to describe the amphipathic nature of a fatty acid?

Accepted Answer

A)  polar head and nonpolar tail 
B)  nonpolar head and polar tail 
C)  polar head and double bonds in tail 
D)  nonpolar head and double bonds in tail 
A)  polar head and nonpolar tail 
B)  nonpolar head and polar tail 
C)  polar head and double bonds in tail 
D)  nonpolar head and double bonds in tail

Question 7

By convention,nucleic acid chains are written starting at the __________ end.

Accepted Answer

A)  amino 
B)  carboxyl 
C)    
D)    
A)  amino 
B)  carboxyl 
C)    
D)

Question 8

What process replicates DNA to make more DNA?

Accepted Answer

A)  DNA transcription 
B)  DNA replication 
C)  DNA translation 
D)  RNA transcription 
A)  DNA transcription 
B)  DNA replication 
C)  DNA translation 
D)  RNA transcription

Question 9

Name the three components of a nucleotide.

Accepted Answer

Nucleotide base,five

Question 10

Differentiate between germ-line cell mutations and somatic cell mutations.

Accepted Answer

Although both are mutations in DNA,if th

Question 11

mRNA is used for what process in the cell?

Accepted Answer

A)  as a template for protein synthesis 
B)  regulation of gene expression 
C)  regulation of RNA 
D)  replication of DNA 
A)  as a template for protein synthesis 
B)  regulation of gene expression 
C)  regulation of RNA 
D)  replication of DNA

Question 12

Why can a guanine not be paired with adenine?

Accepted Answer

A)  Guanine is only found in RNA and adenine is found only in DNA. 
B)  Guanine can form three hydrogen bonds and adenine can form two. 
C)  Guanine can form only two hydrogen bonds and adenine can form three. 
D)  Guanine can only pair with thymine. 
A)  Guanine is only found in RNA and adenine is found only in DNA. 
B)  Guanine can form three hydrogen bonds and adenine can form two. 
C)  Guanine can form only two hydrogen bonds and adenine can form three. 
D)  Guanine can only pair with thymine.

Question 13

Given a DNA sequence of   -CAT-   ,what is the complementary sequence in mRNA?

Accepted Answer

A)    -GUA-   
B)    -AUG-   
C)    -GUA-   
D)    -GTA-   
A)    -GUA-   
B)    -AUG-   
C)    -GUA-   
D)    -GTA-

Question 14

Enzymes function as reaction catalysts in cells.If the enzymes were removed from a cell,the rate of biochemical reactions would

Accepted Answer

A)  increase. 
B)  remain the same. 
C)  decrease. 
D)  It is impossible to know. 
A)  increase. 
B)  remain the same. 
C)  decrease. 
D)  It is impossible to know.

Question 15

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 16

Define the central dogma of molecular biology.

Accepted Answer

The central dogma of molecular

Question 17

Pyruvate decarboxylase converts pyruvate into

Accepted Answer

A)  carbon dioxide and acetaldehyde. 
B)  carbon monoxide and acetaldehyde. 
C)  water and glucose. 
D)  ethanol and carbon dioxide. 
A)  carbon dioxide and acetaldehyde. 
B)  carbon monoxide and acetaldehyde. 
C)  water and glucose. 
D)  ethanol and carbon dioxide.

Question 18

If a plasma membrane is hydrophobic,what kinds of amino acids are MOST likely to be found in the membrane?

Accepted Answer

A)  hydrophilic amino acids 
B)  hydrophobic amino acids 
C)  polar amino acids 
D)  charged amino acids 
A)  hydrophilic amino acids 
B)  hydrophobic amino acids 
C)  polar amino acids 
D)  charged amino acids

Question 19

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 20

An example of experimental biochemistry is trying an experiment and

Accepted Answer

A)  quitting after it fails to prove your hypothesis. 
B)  continuing to try with no changes to protocol. 
C)  optimizing experimental design. 
D)  successfully proving your hypothesis after the first attempt. 
A)  quitting after it fails to prove your hypothesis. 
B)  continuing to try with no changes to protocol. 
C)  optimizing experimental design. 
D)  successfully proving your hypothesis after the first attempt.

Exam 1: Principles of Biochemistry

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

Even though amylose and cellulose contain the same repeating unit of glucose,they are very different in terms of function.Why?

If you were a biochemist who just discovered a new protein,how would you gain insight into the function of the protein?

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

The main difference between deoxyribonucleotides and ribonucleotides is that they have a different

What is another way to describe the amphipathic nature of a fatty acid?

By convention,nucleic acid chains are written starting at the __________ end.

What process replicates DNA to make more DNA?

Name the three components of a nucleotide.

Differentiate between germ-line cell mutations and somatic cell mutations.

mRNA is used for what process in the cell?

Why can a guanine not be paired with adenine?

Given a DNA sequence of -CAT- ,what is the complementary sequence in mRNA?

Enzymes function as reaction catalysts in cells.If the enzymes were removed from a cell,the rate of biochemical reactions would

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

Define the central dogma of molecular biology.

Pyruvate decarboxylase converts pyruvate into

If a plasma membrane is hydrophobic,what kinds of amino acids are MOST likely to be found in the membrane?

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

An example of experimental biochemistry is trying an experiment and

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 and ethylene (C₂H₂)has a bond angle of ,what is the correct bond angle for acetylene (C₂H₂)?