Question 1

Nucleotides and amino acids are both "building blocks" of larger molecules.

Accepted Answer

A) True 
 B)False

Question 2

In photosynthesis, light energy is converted into chemical energy plus heat energy. According to the first law of thermodynamics,

Accepted Answer

A)   the amount light energy is greater than the amount of chemical energy and heat energy combined.
B)   the amount of energy in heat plus chemical energy is greater than the amount of energy in light.
C)   the amount of light energy is equal to the amount of chemical energy and heat energy combined.
D)   the amount of light energy is equal to the amount of chemical energy, since both are forms of potential energy.
E)   there is no relationship between the amount of energy in light versus the amount of energy in chemical and heat energy since they are all different forms of energy.

Question 3

The number of protons and electrons in a neutral atom is

Accepted Answer

A)   quite variable.
B)   the same.
C)   unknown.
D)   always unequal.
E)   unrelated.

Question 4

Isotopes of an element have the same chemical characteristics but slightly different atomic mass due to differing number of neutrons.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following carries a single positive charge?

Accepted Answer

A)   proton
B)   neutron
C)   lepton
D)   electron
E)   quark

Question 6

An acid is a compound that

Accepted Answer

A)   releases hydroxyl ions when dissolved in water.
B)   forms water when mixed with a salt.
C)   releases positively charged hydrogen ions when dissolved in water.
D)   converts starch to glucose.
E)   converts proteins to carbohydrates.

Question 7

Protein molecules differ from those of carbohydrates and lipids in having nitrogen present.

Accepted Answer

A) True 
 B)False

Question 8

The linear sequence of amino acids in a polypeptide chain is called the ________.

Accepted Answer

A)   primary structure
B)   secondary structure
C)   tertiary structure
D)   quaternary structure
E)   beta structure

Question 9

A solution that is slightly alkaline would have a pH in the range of

Accepted Answer

A)   8.5.
B)   7.5.
C)   7.0.
D)   6.5.
E)   2.0.

Question 10

Response to a stimulus ________.

Accepted Answer

A)   requires movement
B)   may include a cellular or chemical change in the individual
C)   may occur without any chemical or physical change by the individual
D)   is not characteristic of rooted plants.
E)   always changes the genetic information

Question 11

If a plant is wounded, some cells near the wound site begin dividing and seal off the wound. Once the wound is sealed, the cells stop dividing. The criterion /criteria of life illustrated here is/are

Accepted Answer

A)   response to an external stimulus.
B)   growth.
C)   reproduction.
D)   adaptation to the environment.
E)   Both response to the environment and growth are involved.

Question 12

The basic units or subunits of which a protein is composed are ________.

Accepted Answer

A)   fatty acids
B)   glycerols
C)   monosaccharides
D)   amino acids
E)   nucleic acids

Question 13

The combining capacity of an atom or ion is referred to as its valence.

Accepted Answer

A) True 
 B)False

Question 14

All hormones and enzymes are lipids.

Accepted Answer

A) True 
 B)False  False

Question 15

Which of the following is NOT an attribute of ALL living organisms?

Accepted Answer

A)   response to stimuli
B)   metabolism
C)   nervous system
D)   reproduction
E)   growth C

Question 16

Peptide bonds link the building blocks of carbohydrates together.

Accepted Answer

A) True 
 B)False  False

Question 17

The bonds that hold atoms together do so through the sharing or transfer of

Accepted Answer

A)   atomic nuclei.
B)   electrons.
C)   protons.
D)   neutrons.
E)   molecules.

Question 18

Which of the following is NOT a form of metabolism?

Accepted Answer

A)   respiration
B)   photosynthesis
C)   diffusion
D)   digestion
E)   assimilation

Question 19

If hydrogen atoms are attached to every available attachment point of fatty acid carbon atoms in a fat, the fat is said to be unsaturated.

Accepted Answer

A) True 
 B)False

Question 20

Each nucleotide of a DNA molecule consists of a nitrogenous base plus ________.

Accepted Answer

A)   a 5-carbon sugar and a phosphate group
B)   an RNA molecule
C)   a sulfur salt
D)   a form of starch and a potassium ion
E)   a lipid and a carbohydrate

Exam 2: The Nature of Life

Nucleotides and amino acids are both "building blocks" of larger molecules.

Correct AnswerverifiedShow Answer

In photosynthesis, light energy is converted into chemical energy plus heat energy. According to the first law of thermodynamics,

Correct AnswerverifiedShow Answer

The number of protons and electrons in a neutral atom is

Correct AnswerverifiedShow Answer

Isotopes of an element have the same chemical characteristics but slightly different atomic mass due to differing number of neutrons.

Correct AnswerverifiedShow Answer

Which of the following carries a single positive charge?

Correct AnswerverifiedShow Answer

An acid is a compound that

Correct AnswerverifiedShow Answer

Protein molecules differ from those of carbohydrates and lipids in having nitrogen present.

Correct AnswerverifiedShow Answer

The linear sequence of amino acids in a polypeptide chain is called the ________.

Correct AnswerverifiedShow Answer

A solution that is slightly alkaline would have a pH in the range of

Correct AnswerverifiedShow Answer

Response to a stimulus ________.

Correct AnswerverifiedShow Answer

If a plant is wounded, some cells near the wound site begin dividing and seal off the wound. Once the wound is sealed, the cells stop dividing. The criterion /criteria of life illustrated here is/are

Correct AnswerverifiedShow Answer

The basic units or subunits of which a protein is composed are ________.

Correct AnswerverifiedShow Answer

The combining capacity of an atom or ion is referred to as its valence.

Correct AnswerverifiedShow Answer

All hormones and enzymes are lipids.

Correct AnswerverifiedFalse

Which of the following is NOT an attribute of ALL living organisms?

Correct AnswerverifiedC

Peptide bonds link the building blocks of carbohydrates together.

Correct AnswerverifiedFalse

The bonds that hold atoms together do so through the sharing or transfer of

Correct AnswerverifiedShow Answer

Which of the following is NOT a form of metabolism?

Correct AnswerverifiedShow Answer

If hydrogen atoms are attached to every available attachment point of fatty acid carbon atoms in a fat, the fat is said to be unsaturated.

Correct AnswerverifiedShow Answer

Each nucleotide of a DNA molecule consists of a nitrogenous base plus ________.

Correct AnswerverifiedShow Answer

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False

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C

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False

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