Question 1

What type of solution has a pH of 8.2?

Accepted Answer

A) neutral 
B) acid 
C) ionic 
D) buffer 
E) base 
A) neutral 
B) acid 
C) ionic 
D) buffer 
E) base E

Question 2

A neutral atom of phosphorus was found to have an atomic number of 15 and a mass number of 31.What is the total number of electrons in this atom?

Accepted Answer

A) 16 
B) 15 
C) 31 
D) 8 
E) 46 
A) 16 
B) 15 
C) 31 
D) 8 
E) 46 B

Question 3

In order to determine if a patient has a thyroid tumor,which diagnostic procedure could be performed?

Accepted Answer

A) Patient drinks low levels of radioactive Iodine-131,then has an X-ray. 
B) 
Patient drinks high levels of radioactive Iodine-131,then has a PET scan. 
C) Injection of low levels of radioactive glucose,then patient has a PET scan. 
D) Injection of low levels of radioactive Thallium-201,then patient has a PET sca.n 
E) Injection of high levels of radioactive glucose,then patient has an X-ray. 
A) Patient drinks low levels of radioactive Iodine-131,then has an X-ray. 
B) 
Patient drinks high levels of radioactive Iodine-131,then has a PET scan. 
C) Injection of low levels of radioactive glucose,then patient has a PET scan. 
D) Injection of low levels of radioactive Thallium-201,then patient has a PET sca.n 
E) Injection of high levels of radioactive glucose,then patient has an X-ray. D

Question 4

What is different between two isotopes of the same element?

Accepted Answer

A) valance number 
B) proton number 
C) mass number 
D) atomic number 
E) atomic charge 
A) valance number 
B) proton number 
C) mass number 
D) atomic number 
E) atomic charge

Question 5

When salt crystals dissolve in water,which chemical interactions in the salt crystals are being dissociated by the water molecules?

Accepted Answer

A) nonpolar covalent bonds 
B) hydrogen bonds 
C) polar covalent bonds 
D) ionic bonds 
E) hydrophobic interactions 
A) nonpolar covalent bonds 
B) hydrogen bonds 
C) polar covalent bonds 
D) ionic bonds 
E) hydrophobic interactions

Question 6

Which of the following elements is important in smaller quantities than is true for the six major elements in living things?

Accepted Answer

A) carbon 
B) iron 
C) oxygen 
D) nitrogen 
E) hydrogen 
A) carbon 
B) iron 
C) oxygen 
D) nitrogen 
E) hydrogen

Question 7

Which of the following is not a use of water by living organisms?

Accepted Answer

A) external transportation for chemicals 
B) help exchange heat 
C) aids in homeostasis 
D) provides nutrients for metabolism 
E) provides a medium for movement 
A) external transportation for chemicals 
B) help exchange heat 
C) aids in homeostasis 
D) provides nutrients for metabolism 
E) provides a medium for movement

Question 8

Which ions found specifically in bones and teeth are important in muscle contractions and nerve conduction?

Accepted Answer

A) sodium 
B) chloride 
C) bicarbonate 
D) potassium 
E) calcium 
A) sodium 
B) chloride 
C) bicarbonate 
D) potassium 
E) calcium

Question 9

Which term describes the tendency of water molecules to cling to other water molecules?

Accepted Answer

A) adhesion 
B) electronegativity 
C) polar 
D) ccohesion 
E) nonpolar 
A) adhesion 
B) electronegativity 
C) polar 
D) ccohesion 
E) nonpolar

Question 10

If a neutral oxygen atom gains two electrons from another atom,then the overall charge of this oxygen atom will become

Accepted Answer

A) +2 
B) 0 
C) -2 
D) unknown,as you need to know how many protons are present 
E) 2 more than its original mass number 
A) +2 
B) 0 
C) -2 
D) unknown,as you need to know how many protons are present 
E) 2 more than its original mass number

Question 11

Which factor determines whether an atom will be chemically reactive?

Accepted Answer

A) the number of electrons in the outer shell 
B) the ratio of protons to electrons 
C) the number of electrons in the inner shell 
D) the ratio of protons to neutrons 
E) the number of electron shells an atom has 
A) the number of electrons in the outer shell 
B) the ratio of protons to electrons 
C) the number of electrons in the inner shell 
D) the ratio of protons to neutrons 
E) the number of electron shells an atom has

Question 12

In a solution,if the hydroxide ion concentration exceeds the hydrogen ion concentration the solution is considered to be

Accepted Answer

A) a buffer. 
B) an acid. 
C) a neutral solution. 
D) a base. 
E) a solutE. 
A) a buffer. 
B) an acid. 
C) a neutral solution. 
D) a base. 
E) a solutE.

Question 13

Which kind of bond occurs between positively and negatively charged atoms?

Accepted Answer

A) covalent bond 
B) adhesive interaction 
C) hydrogen bond 
D) ionic bond 
E) hydrophobic interaction 
A) covalent bond 
B) adhesive interaction 
C) hydrogen bond 
D) ionic bond 
E) hydrophobic interaction

Question 14

The bond which results from a transfer of electrons from one atom to another is called an ionic bond.

Accepted Answer

A) True 
 B)False

Question 15

Although high doses of radiation are harmful to cells,how can low levels of radioactive isotopes be used medicinally?

Accepted Answer

A) as tracers in imaging organs using Xrays and PET Scans 
B) to reduce obesity and diabetes in teenagers 
C) to create drugs that work faster than normal 
D) to destroy aging and unwanted cells 
E) to prevent ultraviolet damage from the sun 
A) as tracers in imaging organs using Xrays and PET Scans 
B) to reduce obesity and diabetes in teenagers 
C) to create drugs that work faster than normal 
D) to destroy aging and unwanted cells 
E) to prevent ultraviolet damage from the sun

Question 16

Two or more different elements bonded together is called an isotope.

Accepted Answer

A) True 
 B)False

Question 17

Which six elements are the main components in living organisms?

Accepted Answer

A) carbon,hydrogen,nitrogen,oxygen,phosphorus,sulfur 
B) copper,iron,magnesium,sodium,water,zinc 
C) carbon dioxide,hydrogen,nitrogen,oxygen,phosphate,sulfate 
D) calcium,hydrogen,iron,potassium,sulfur,water 
E) aluminum,magnesium,nitrogen,silicon,sodium,sulfur 
A) carbon,hydrogen,nitrogen,oxygen,phosphorus,sulfur 
B) copper,iron,magnesium,sodium,water,zinc 
C) carbon dioxide,hydrogen,nitrogen,oxygen,phosphate,sulfate 
D) calcium,hydrogen,iron,potassium,sulfur,water 
E) aluminum,magnesium,nitrogen,silicon,sodium,sulfur

Question 18

The identity of any atom can be determined by the

Accepted Answer

A) number of electrons. 
B) atomic charge. 
C) atomic mass. 
D) number of protons. 
E) number of neutrons. 
A) number of electrons. 
B) atomic charge. 
C) atomic mass. 
D) number of protons. 
E) number of neutrons.

Question 19

In a DNA molecule,the polar "G" nucleotide on one strand always bonds with the polar "C" nucleotide on the other strand.What kind of bonds are these?

Accepted Answer

A) hydrophobic interactions 
B) hydrogen bonds 
C) adhesive interactions 
D) covalent bonds 
E) ionic bonds 
A) hydrophobic interactions 
B) hydrogen bonds 
C) adhesive interactions 
D) covalent bonds 
E) ionic bonds

Question 20

What type of chemical bond occurs specifically between one hydrogen atom and one oxygen atom in a water molecule?

Accepted Answer

A) a polar covalent bond 
B) an ionic bond 
C) hydrogen bond 
D) a nonpolar covalent bond 
E) a hydrophobic interaction 
A) a polar covalent bond 
B) an ionic bond 
C) hydrogen bond 
D) a nonpolar covalent bond 
E) a hydrophobic interaction

Exam 2: Basic Chemistry of Cells

What type of solution has a pH of 8.2?

A neutral atom of phosphorus was found to have an atomic number of 15 and a mass number of 31.What is the total number of electrons in this atom?

In order to determine if a patient has a thyroid tumor,which diagnostic procedure could be performed?

What is different between two isotopes of the same element?

When salt crystals dissolve in water,which chemical interactions in the salt crystals are being dissociated by the water molecules?

Which of the following elements is important in smaller quantities than is true for the six major elements in living things?

Which of the following is not a use of water by living organisms?

Which ions found specifically in bones and teeth are important in muscle contractions and nerve conduction?

Which term describes the tendency of water molecules to cling to other water molecules?

If a neutral oxygen atom gains two electrons from another atom,then the overall charge of this oxygen atom will become

Which factor determines whether an atom will be chemically reactive?

In a solution,if the hydroxide ion concentration exceeds the hydrogen ion concentration the solution is considered to be

Which kind of bond occurs between positively and negatively charged atoms?

The bond which results from a transfer of electrons from one atom to another is called an ionic bond.

Although high doses of radiation are harmful to cells,how can low levels of radioactive isotopes be used medicinally?

Two or more different elements bonded together is called an isotope.

Which six elements are the main components in living organisms?

The identity of any atom can be determined by the

In a DNA molecule,the polar "G" nucleotide on one strand always bonds with the polar "C" nucleotide on the other strand.What kind of bonds are these?

What type of chemical bond occurs specifically between one hydrogen atom and one oxygen atom in a water molecule?

Biology, the Study of Life

Organic Molecules of Cells

Structure and Function of Cells

Dynamic Activities of Cells

Pathways of Photosynthesis

Pathways of Cellular Respiration

Cellular Reproduction

Sexual Reproduction

Patterns of Genetic Inheritance

Molecular Biology of Inheritance

Regulation of Gene Activity

Biotechnology and Genomics

Evidence of Evolution

Speciation and Evolution

The Evolutionary History of Life on Earth

Evolution of Microbial Life

Evolution of Protists

Evolution of Plants and Fungi

Evolution of Animals

Evolution of Humans

Plant Organization and Homeostasis

Transport and Nutrition in Plants

Control of Growth Responses in Plants

Reproduction in Plants

Animal Organization and Homeostasis

Coordination by Neural Signaling

Sense Organs

Locomotion and Support Systems

Circulation and Cardiovascular Systems

Lymph Transport and Immunity

Digestive Systems and Nutrition

Gas Exchange and Transport in Animals

Osmoregulation and Excretion

Coordination by Hormone Signaling

Reproduction and Development

Population Ecology

Behavioral Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation Biology

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