BIOS 100 Final Exam 3

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BIOS 100 Final Exam 3

1. The genus portion of a scientific name when written by hand is Select one:

• not capitalized, not underlined
• capitalized, underlined
• capitalized, not underlined
• not capitalized, underlined

e. connected with the species names to form one word:

Answer b. capitalized, under- lined

• Which is the correct format for a scientific name? Select

one:

• Homo Sapiens
• Homo Sapiens
• homo sapiens
• Homo sapiens (italicized)

e. Homo sapiens:

Answer d. Homo sapiens (italicized)

• The principal point of the Darwinian theory of evolution by natural selection was that

Select one:

• Long-term heritable changes in organisms are caused by use and disuse.
• Those mutations that adapt an organism to a given environment somehow always arise in

the greatest frequency in the organisms that occupy that environment.

• Mutations are caused by all sorts of environmental influences.
• Survival of characteristics in a population depends on competition between organisms,

especially between members of the same species.

e. All of these.:

Answer d. Survival of characteristics in a population depends on competi- tion between organisms, especially between members of the same species.

• Which of the following is a naked proton?

Select one:

• hydrogen ion
• acid
• base
• hydroxyl ion

e. acceptor: 1 / 4

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Answer a. hydrogen ion

• A pH of 10 is how many times as basic as a pH of 7? Select

one:

• 2
• 3
• 10
• 100

e. 1,000:

Answer e. 1,000

• When 14C goes through radioactive decay, one of its neutrons splits into a proton and an

electron. What does 14C become?

Select one:

• 13C6
• 14N7
• 13N7
• 13B5

e. 12B5:

Answer b. 14N7

• If the atomic weight of hydrogen is 1, of carbon is 12, and of oxygen is 16, the molecular

weight of glucose, C6H12O6, expressed in grams is

Select one:

• 24 grams
• 28 grams
• 52 grams
• 168 grams

e. 180 grams:

Answer e. 180 grams

• Radioactive

isotopes Select one:

• are electrically unbalanced
• behave the same chemically, physically, and biologically as other isotopes
• have an excess number of electrons
• have an excess number of neutrons
• are produced when substances are exposed to radiation: 2 / 4

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Answer d. have an excess number of neutrons

• A salt will dissolve in water to form

Select one:

• acids
• gases
• ions
• bases

e. polar solvents:

Answer c. ions

• What is formed when an atom loses or gains an electron? Select

one:

• a new element
• ion
• molecule
• bond

e. isotope:

Answer b. ion

• Four of the five answers listed below are alkaline (pH above seven). Select the exception.

Select one:

• milk of magnesia
• household ammonia
• Tums
• phosphate detergent

e. black coffee:

Answer e. black coffee

• Isotopes of the same element differ in the number of Select

one:

• electrons
• neutrons
• protons
• electrons and protons

e. protons and neutrons:

Answer b. neutrons 3 / 4

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• Four of the five answers listed below are positively charged ions. Select the exception.

Select one:

• potassium ion (19)
• hydrogen ion (1)
• calcium ion (20)
• magnesium ion (12)

e. chloride ion (17):

Answer e. chloride ion (17)

14. All alcohols have a(n) group. Select one:

• carboxyl
• hydroxyl
• amino
• methyl

e. carbonyl:

Answer b. hydroxyl

15. In sickle cell disease, the hemoglobin contains an incorrect Select one:

• amino acid
• heme
• oxygen atom
• both amino acid and heme

e. both heme and oxygen atom:

Answer a. amino acid

16. All organic acids have a(n) group. Select one:

• carboxyl
• hydroxyl
• amino
• methyl

e. carbonyl:

Answer a. carboxyl

• Which reaction results in the breakdown of a chemical into simpler sub- stances?

Select one:

• synthesis
• / 4