Question 1

The diffusion of large molecules such as enzymes is significantly slowed by the presence of the cytoskeleton.

Accepted Answer

A) True 
 B)False  True

Question 2

Enzymes are protein catalysts that form an intermediate with a substrate that fits into it.

Accepted Answer

A) True 
 B)False  True

Question 3

A spontaneous chemical reaction always has a change.

Accepted Answer

A)  positive Gibbʹs free energy 
B)  negative Gibbʹs free energy 
C)  positive enthalpy 
D)  negative enthalpy 
E)  positive entropy 
A)  positive Gibbʹs free energy 
B)  negative Gibbʹs free energy 
C)  positive enthalpy 
D)  negative enthalpy 
E)  positive entropy B

Question 4

A peptide bond is formed by the condensation of different functional groups from two amino acids.

Accepted Answer

A) True 
 B)False

Question 5

The only reason phages are not considered to be cells is because they do not contain a plasma membrane.

Accepted Answer

A) True 
 B)False

Question 6

Under most biological conditions, acid groups and amino groups are fully protonated.

Accepted Answer

A) True 
 B)False

Question 7

The endoplasmic reticulum is the major site of RNA synthesis and the site of assembly of ribosomes.

Accepted Answer

A) True 
 B)False

Question 8

Lipids aggregate to form bilayers because some lipid molecules are hydrophobic and other lipid molecules are hydrophilic.

Accepted Answer

A) True 
 B)False

Question 9

Fermentation in the absence of cells demonstrated that metabolic processes were chemical in nature.

Accepted Answer

A) True 
 B)False

Question 10

Thermodynamics and its laws are obeyed by living cells.

Accepted Answer

A) True 
 B)False

Question 11

All prokaryotic cells are about 1/10 the size of an average eukaryotic cell or smaller.

Accepted Answer

A) True 
 B)False

Question 12

Actin has been shown to be one of the most evolutionarily conserved proteins. It is present in all eukaryotic cells and frequently is the most abundant protein in the cell.

Accepted Answer

A) True 
 B)False

Question 13

Functional groups describe one or more portions of organic compounds found in living cells.

Accepted Answer

A) True 
 B)False

Question 14

The modified lock-and-key theory of enzyme action proposed by Emil Fischer has been completely replaced by more modern ideas of catalysis.

Accepted Answer

A) True 
 B)False

Question 15

Bioinformatics has permitted rapid advances in our understanding of structural macromolecules from living cells.

Accepted Answer

A) True 
 B)False

Question 16

All cells have kept the same general patterns of metabolism, a very similar genetic code and the same monomers or residues.

Accepted Answer

A) True 
 B)False

Question 17

Molecules from living cells cannot be synthesized outside of living cells.

Accepted Answer

A) True 
 B)False

Question 18

Ribosomes on the surface of rough endoplasmic reticulum are the site of ATP synthesis.

Accepted Answer

A) True 
 B)False

Question 19

The study of the energy changes during metabolic reactions is called .

Accepted Answer

A)  bioinformatics 
B)  metabodynamics 
C)  thermometrics 
D)  bioenergetics 
E)  biological heat dynamics 
A)  bioinformatics 
B)  metabodynamics 
C)  thermometrics 
D)  bioenergetics 
E)  biological heat dynamics

Question 20

Eukaryotic cells are distinguished from prokaryotes by their usually larger size, a complex cytoskeleton and membrane-bounded organelles.

Accepted Answer

A) True 
 B)False

Exam 1: Introduction to Biochemistry

The diffusion of large molecules such as enzymes is significantly slowed by the presence of the cytoskeleton.

Enzymes are protein catalysts that form an intermediate with a substrate that fits into it.

A spontaneous chemical reaction always has a change.

A peptide bond is formed by the condensation of different functional groups from two amino acids.

The only reason phages are not considered to be cells is because they do not contain a plasma membrane.

Under most biological conditions, acid groups and amino groups are fully protonated.

The endoplasmic reticulum is the major site of RNA synthesis and the site of assembly of ribosomes.

Lipids aggregate to form bilayers because some lipid molecules are hydrophobic and other lipid molecules are hydrophilic.

Fermentation in the absence of cells demonstrated that metabolic processes were chemical in nature.

Thermodynamics and its laws are obeyed by living cells.

All prokaryotic cells are about 1/10 the size of an average eukaryotic cell or smaller.

Actin has been shown to be one of the most evolutionarily conserved proteins. It is present in all eukaryotic cells and frequently is the most abundant protein in the cell.

Functional groups describe one or more portions of organic compounds found in living cells.

The modified lock-and-key theory of enzyme action proposed by Emil Fischer has been completely replaced by more modern ideas of catalysis.

Bioinformatics has permitted rapid advances in our understanding of structural macromolecules from living cells.

All cells have kept the same general patterns of metabolism, a very similar genetic code and the same monomers or residues.

Molecules from living cells cannot be synthesized outside of living cells.

Ribosomes on the surface of rough endoplasmic reticulum are the site of ATP synthesis.

The study of the energy changes during metabolic reactions is called .

Eukaryotic cells are distinguished from prokaryotes by their usually larger size, a complex cytoskeleton and membrane-bounded organelles.

Water

Amino Acids and the Primary Structures of Proteins

Proteins: Three-Dimensional Structure and Function

Properties of Enzymes

Mechanisms of Enzymes

Coenzymes and Vitamins

Carbohydrates

Lipids and Membranes

Introduction to Metabolism

Glycolysis

Gluconeogenesis, the Pentose Phosphate Pathway, and Glycogen Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Nucleic Acids

Dna Replication, Repair, and Recombination

Transcription and Rna Processing

Protein Synthesis

Recombinant Dna Technology

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