Question 1

The atomic number of an atom equals the number of ______ and the atomic weight equals the ____.

Accepted Answer

A)   neutrons; number of protons
B)   protons; weight of all the electrons
C)   neutrons; number of protons plus electrons
D)   protons; number of protons plus neutronsE) C) and D)
F) B) and D)

Question 2

Which of the following is not organic?

Accepted Answer

A)   Sodium chloride
B)   Lipids
C)   Nucleic acids
D)   EnzymesE) A) and C)
F) B) and D) A

Question 3

Which of the following is not a source of ionizing radiation?

Accepted Answer

A)   Cosmic rays from outer space
B)   Cholesterol and triglycerides
C)   Atomic and nuclear weapons
D)   Smoke detectorsE) None of the above
F) A) and B)

Question 4

Proteins encode nucleic acids.

Accepted Answer

A) True 
 B)False

Question 5

Nucleic acids are composed of building blocks called amino acids.

Accepted Answer

A) True 
 B)False  False

Question 6

Exposure to ionizing radiation may

Accepted Answer

A)   cloud the lens of the eye.
B)   cause cancer.
C)   interfere with normal growth.
D)   all of the above.E) B) and D)
F) B) and C)

Question 7

Two or more atoms bonding form a ________.

Accepted Answer

The answer of Two or more atoms bonding form a...

Question 8

The number of protons in an atom of an element always equals its atomic weight.

Accepted Answer

A) True 
 B)False

Question 9

Sodium and chloride atoms combine readily because they both lose electrons.

Accepted Answer

A) True 
 B)False

Question 10

A chemical reaction in which parts of different molecules trade positions is a(n)

Accepted Answer

A)   decomposition reaction.
B)   exchange reaction.
C)   reversible reaction.
D)   synthesis reaction.E) B) and C)
F) None of the above

Question 11

A person with alkalosis has a blood pH less than 7.3.

Accepted Answer

A) True 
 B)False

Question 12

The difference in hydrogen ion concentration between solutions with pH 4 and pH 5 is

Accepted Answer

A)   twofold.
B)   fivefold.
C)   tenfold.
D)   twentyfold.E) A) and D)
F) C) and D)

Question 13

A complete atom is electrically neutral because

Accepted Answer

A)   the number of protons equals the number of neutrons.
B)   the number of electrons equals the number of neutrons.
C)   the number of electrons equals the number of protons.
D)   electrons is greater than the number of protons.E) A) and B)
F) All of the above

Question 14

Which of the following is(are)  ionizing radiation?

Accepted Answer

A)   Cosmic radiation only
B)   Gamma radiation only
C)   Both cosmic radiation and gamma radiation
D)   Neither cosmic nor gamma radiationE) A) and B)
F) A) and C)

Question 15

Apricots have a pH of 3.8. Therefore, they are ______.
or

Accepted Answer

The answer of Apricots have a pH of 3.8. Therefore,...

Question 16

Nucleic acids are

Accepted Answer

A)   very small, simple molecules.
B)   structural molecules that have no function other than support.
C)   composed of building blocks called nucleotides.
D)   primary sources of cellular energy.E) A) and D)
F) B) and C)

Question 17

The amino acid sequence of a protein is its __________ structure.

Accepted Answer

primary

Question 18

A simple carbohydrate

Accepted Answer

A)   has a molecular formula of C6H12O6.
B)   is a building block of protein.
C)   consists of several joined chains.
D)   has only one nucleotide.E) A) and D)
F) A) and C)

Question 19

Nucleic acids include

Accepted Answer

A)   proteins and DNA.
B)   RNA and DNA.
C)   enzymes and RNA.
D)   steroids and triglycerides.E) None of the above
F) A) and B)

Question 20

Which of the following groups of compounds is hydrophobic?

Accepted Answer

A)   Carbohydrates
B)   Lipids
C)   Proteins
D)   Nucleic AcidsE) None of the above
F) All of the above

Exam 2: Chemical Basis of Life

The atomic number of an atom equals the number of ______ and the atomic weight equals the ____.

Correct AnswerverifiedShow Answer

Which of the following is not organic?

Correct AnswerverifiedA

Which of the following is not a source of ionizing radiation?

Correct AnswerverifiedShow Answer

Proteins encode nucleic acids.

Correct AnswerverifiedShow Answer

Nucleic acids are composed of building blocks called amino acids.

Correct AnswerverifiedFalse

Exposure to ionizing radiation may

Correct AnswerverifiedShow Answer

Two or more atoms bonding form a ________.

Correct AnswerverifiedShow Answer

The number of protons in an atom of an element always equals its atomic weight.

Correct AnswerverifiedShow Answer

Sodium and chloride atoms combine readily because they both lose electrons.

Correct AnswerverifiedShow Answer

A chemical reaction in which parts of different molecules trade positions is a(n)

Correct AnswerverifiedShow Answer

A person with alkalosis has a blood pH less than 7.3.

Correct AnswerverifiedShow Answer

The difference in hydrogen ion concentration between solutions with pH 4 and pH 5 is

Correct AnswerverifiedShow Answer

A complete atom is electrically neutral because

Correct AnswerverifiedShow Answer

Which of the following is(are) ionizing radiation?

Correct AnswerverifiedShow Answer

Apricots have a pH of 3.8. Therefore, they are ______. or

Correct AnswerverifiedShow Answer

Nucleic acids are

Correct AnswerverifiedShow Answer

The amino acid sequence of a protein is its __________ structure.

Correct Answerverifiedprimary

A simple carbohydrate

Correct AnswerverifiedShow Answer

Nucleic acids include

Correct AnswerverifiedShow Answer

Which of the following groups of compounds is hydrophobic?

Correct AnswerverifiedShow Answer

The atomic number of an atom equals the number of __ and the atomic weight equals the .

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
primary

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified