Question 1

The antimicrobial drug imidazole inhibits sterol synthesis.This would most likely interfere with

Accepted Answer

A)  bacterial cell walls.
B)  fungal cell walls.
C)  eukaryotic plasma membranes.
D)  prokaryotic plasma membranes.
E)  genes.F) B) and C)
G) B) and D) C

Question 2

You put a spoonful of table salt,NaCl,into a glass of water and it dissolves.You repeat this test,but drop the spoonful of salt into a glass of vegetable oil instead.What happens,and why?

Accepted Answer

A)  The salt doesn't dissolve because oil is nonpolar,and couldn't dissociate the ionic bond between the Na⁺ and Cl⁻ ions.
B)  The salt dissolves in the oil just the same as it did in the water.
C)  The salt dissolves in the oil,but takes much longer to do so because oil molecules move more slowly than water,slowing the dissolution process down.
D)  The salt doesn't dissolve because oil is polar,and only nonpolar solvents would cause the dissociation of the Na⁺ and Cl⁻ ions in the table salt.E) A) and D)
F) B) and C)

Question 3

All forms of life function optimally at a pH of 7.

Accepted Answer

A) True 
 B)False

Question 4

Which type of molecule NEVER contains a phosphate group?

Accepted Answer

A)  triglycerides
B)  phospholipid
C)  nucleic acid
D)  ATPE) All of the above
F) None of the above

Question 5

What is the type of weak bond between the hydrogen of one molecule and the nitrogen of another molecule,where the two don't actively share an electron?

Accepted Answer

A)  ionic bond
B)  covalent bond
C)  hydrogen bond
D)  disulfide bond
E)  hydrophobic bondF) A) and B)
G) A) and C)

Question 6

Antacids neutralize acid by the following reaction.Identify the salt in the following equation: Mg(OH) ₂ + 2HCl → MgCl₂ + H₂O

Accepted Answer

A)  Mg(OH) ₂
B)  HCl
C)  MgCl₂
D)  H₂O
E)  None of the answers is correct.F) A) and B)
G) A) and C)

Question 7

Subtle differences exist in the plasma membrane molecules of the organisms in the three Domains._______ functional groups are found in the plasma membrane molecules of bacteria and eukarya,while ________ functional groups are found in the plasma membrane molecules of archaea.

Accepted Answer

A)  amino;carboxyl
B)  ether;ester
C)  ester;ether
D)  ketone;aldehyde
E)  aldehyde;ketoneF) A) and B)
G) D) and E)

Question 8

Which of the following is a base?

Accepted Answer

A)  C₂H₅OCOOH → H⁺ + C₂H₅OCOO⁻
B)  C₂H₅OH
C)  NaOH → Na⁺ + OH⁻
D)  H₂O → H⁺ + OH⁻
E)  H₂COF) B) and E)
G) A) and E)

Question 9

Identify the two functional groups that interact to form a peptide bond.

Accepted Answer

A)  amino group and carboxyl group
B)  carboxyl group and ester group
C)  amino group and ester group
D)  ester group and hydroxyl group
E)  hydroxyl group and amino groupF) All of the above
G) A) and B)

Question 10

A scientist claims that when a protein is denatured,it can be expected that its secondary structure will more likely be retained when compared to all other levels of protein structure structures.Do you agree? Explain.

Accepted Answer

I do not agree with the scientist's clai...

Question 11

Structurally,ATP is most like which type of molecule?

Accepted Answer

A)  carbohydrate
B)  lipid
C)  protein
D)  nucleic acidE) A) and B)
F) None of the above

Question 12

A friend tells you that he recently read an article claiming that you need to work to restore the alkalinity of your blood to remain healthy.Why is this impossible and impractical (and unhealthy even if you could make it happen) ?

Accepted Answer

A)  The normal pH of human blood is in the acidic range,so making it alkaline would kill you.
B)  Blood is usually around the neutral (pH 7) range,not the alkaline range,in healthy human beings.
C)  Blood contains buffers that prevent the pH from changing too drastically,so trying to forcibly alter blood pH wouldn't work effectively.
D)  The normal pH of human blood is already in the alkaline range,so it isn't necessary to "restore" it to that point.
E)  Blood is usually around the neutral (pH 7) range,not the alkaline range,in healthy human beings AND blood contains buffers that prevent the pH from changing too drastically,so trying to forcibly alter blood pH wouldn't work effectively.F) A) and B)
G) A) and E)

Question 13

Which of the following statements about the atom is  126\begin{array} { c } 12 \6\end{array}126​  C FALSE?

Accepted Answer

A)  It has 6 protons in its nucleus.
B)  It has 12 neutrons in its nucleus.
C)  It has 6 electrons orbiting the nucleus.
D)  Its atomic number is 6.
E)  Its atomic weight is 12. F) A) and D)
G) B) and E) B

Question 14

Which type of molecule is composed of (CH₂O) units?

Accepted Answer

A)  carbohydrate
B)  lipid
C)  nucleic acid
D)  proteinE) None of the above
F) C) and D)

Question 15

Which type of molecule contains -NH₂ (amino) groups?

Accepted Answer

A)  carbohydrate
B)  triglycerides
C)  nucleic acid
D)  proteinE) All of the above
F) A) and D)

Question 16

Carbon dioxide is an organic molecule.

Accepted Answer

A) True 
 B)False

Question 17

Elements only achieve the full complement of electrons in outermost energy shells by donating away or sharing electrons.

Accepted Answer

A) True 
 B)False

Question 18

Two glucose molecules are combined by a dehydration synthesis reaction to make a maltose molecule.What is the chemical formula for maltose?

Accepted Answer

A)  C₃H₆O₃
B)  C₆H₁₂O₆
C)  C₁₂H₂₄O₁₂
D)  C₁₂H₂₂O₁₁
E)  C₁₂H₂₃O₁₀F) A) and B)
G) A) and C)

Question 19

Most amino acids found in cells demonstrate what type of chirality?

Accepted Answer

A)  L-isomers
B)  D-isomers
C)  C-isomers
D)  B-isomers
E)  A-isomersF) A) and E)
G) All of the above

Question 20

Radioisotopes are frequently used to label molecules in a cell.The fate of atoms and molecules in a cell can then be followed.Assume Saccharomyces cerevisiae is grown in a nutrient medium containing the radioisotope ³⁵S.After a 48-hour incubation,the ³⁵S would most likely be found in the S.cerevisiae's

Accepted Answer

A)  carbohydrates.
B)  nucleic acids.
C)  water.
D)  lipids.
E)  proteins.F) A) and D)
G) A) and C) E

Exam 2: Chemical Principles

The antimicrobial drug imidazole inhibits sterol synthesis.This would most likely interfere with

Correct Answer
verified
C

You put a spoonful of table salt,NaCl,into a glass of water and it dissolves.You repeat this test,but drop the spoonful of salt into a glass of vegetable oil instead.What happens,and why?

Correct Answer
verified

All forms of life function optimally at a pH of 7.

Correct Answer
verified

Which type of molecule NEVER contains a phosphate group?

Correct Answer
verified

What is the type of weak bond between the hydrogen of one molecule and the nitrogen of another molecule,where the two don't actively share an electron?

Correct Answer
verified

Antacids neutralize acid by the following reaction.Identify the salt in the following equation: Mg(OH) ₂ + 2HCl → MgCl₂ + H₂O

Correct Answer
verified

Subtle differences exist in the plasma membrane molecules of the organisms in the three Domains._ functional groups are found in the plasma membrane molecules of bacteria and eukarya,while __ functional groups are found in the plasma membrane molecules of archaea.

Correct Answer
verified

Which of the following is a base?

Correct Answer
verified

Identify the two functional groups that interact to form a peptide bond.

Correct Answer
verified

A scientist claims that when a protein is denatured,it can be expected that its secondary structure will more likely be retained when compared to all other levels of protein structure structures.Do you agree? Explain.

Correct Answer
Answered by ExamLex AI
I do not agree with the scientist's clai...
View Answer

Structurally,ATP is most like which type of molecule?

Correct Answer
verified

A friend tells you that he recently read an article claiming that you need to work to restore the alkalinity of your blood to remain healthy.Why is this impossible and impractical (and unhealthy even if you could make it happen) ?

Correct Answer
verified

Which of the following statements about the atom is $\begin{array} { c } 12 \\6\end{array}$ C FALSE?

Correct Answer
verified
B

Which type of molecule is composed of (CH₂O) units?

Correct Answer
verified

Which type of molecule contains -NH₂ (amino) groups?

Correct Answer
verified

Carbon dioxide is an organic molecule.

Correct Answer
verified

Elements only achieve the full complement of electrons in outermost energy shells by donating away or sharing electrons.

Correct Answer
verified

Two glucose molecules are combined by a dehydration synthesis reaction to make a maltose molecule.What is the chemical formula for maltose?

Correct Answer
verified

Most amino acids found in cells demonstrate what type of chirality?

Correct Answer
verified

Correct Answer
verified
E

Exam 2: Chemical Principles

The antimicrobial drug imidazole inhibits sterol synthesis.This would most likely interfere with

Correct AnswerverifiedC

You put a spoonful of table salt,NaCl,into a glass of water and it dissolves.You repeat this test,but drop the spoonful of salt into a glass of vegetable oil instead.What happens,and why?

Correct AnswerverifiedShow Answer

All forms of life function optimally at a pH of 7.

Correct AnswerverifiedShow Answer

Which type of molecule NEVER contains a phosphate group?

Correct AnswerverifiedShow Answer

What is the type of weak bond between the hydrogen of one molecule and the nitrogen of another molecule,where the two don't actively share an electron?

Correct AnswerverifiedShow Answer

Antacids neutralize acid by the following reaction.Identify the salt in the following equation: Mg(OH) ₂ + 2HCl → MgCl₂ + H₂O

Correct AnswerverifiedShow Answer

Subtle differences exist in the plasma membrane molecules of the organisms in the three Domains._______ functional groups are found in the plasma membrane molecules of bacteria and eukarya,while ________ functional groups are found in the plasma membrane molecules of archaea.

Correct AnswerverifiedShow Answer

Which of the following is a base?

Correct AnswerverifiedShow Answer

Identify the two functional groups that interact to form a peptide bond.

Correct AnswerverifiedShow Answer

A scientist claims that when a protein is denatured,it can be expected that its secondary structure will more likely be retained when compared to all other levels of protein structure structures.Do you agree? Explain.

Correct AnswerAnswered by ExamLex AII do not agree with the scientist's clai...View AnswerShow Answer

Structurally,ATP is most like which type of molecule?

Correct AnswerverifiedShow Answer

A friend tells you that he recently read an article claiming that you need to work to restore the alkalinity of your blood to remain healthy.Why is this impossible and impractical (and unhealthy even if you could make it happen) ?

Correct AnswerverifiedShow Answer

Which of the following statements about the atom is 126\begin{array} { c } 12 \\6\end{array}126​ C FALSE?

Correct AnswerverifiedB

Which type of molecule is composed of (CH₂O) units?

Correct AnswerverifiedShow Answer

Which type of molecule contains -NH₂ (amino) groups?

Correct AnswerverifiedShow Answer

Carbon dioxide is an organic molecule.

Correct AnswerverifiedShow Answer

Elements only achieve the full complement of electrons in outermost energy shells by donating away or sharing electrons.

Correct AnswerverifiedShow Answer

Two glucose molecules are combined by a dehydration synthesis reaction to make a maltose molecule.What is the chemical formula for maltose?

Correct AnswerverifiedShow Answer

Most amino acids found in cells demonstrate what type of chirality?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedE

Correct Answer
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C

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verified

Subtle differences exist in the plasma membrane molecules of the organisms in the three Domains._ functional groups are found in the plasma membrane molecules of bacteria and eukarya,while __ functional groups are found in the plasma membrane molecules of archaea.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
I do not agree with the scientist's clai...
View Answer

Correct Answer
verified

Correct Answer
verified

Which of the following statements about the atom is $\begin{array} { c } 12 \\6\end{array}$ C FALSE?

Correct Answer
verified
B

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E