Bio Review

During cell respiration, animals take in oxygen and food from the environment and fuel a series of chemical reactions that ultimately produce water and carbon dioxide. Which of the core concepts of biology is exemplified by cell respiration?

• Structure and function

• Evolution

• Pathways and transformations of energy and matter

• Systems

• Information flow, exchange, and storage

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The wing of a flamingo is used for flying, and the flipper of a blue whale is used for swimming. Evidence from the fossil record indicates that both structures were modified from a front limb that was used for walking in a pre-existing ancestor. This is an example of which core concept(s) in biology?

• Living systems depend on information transactions

• Structure determines function

• Evolution explains the unity and diversity of life

• Life is subject to chemical and physical laws (systems)

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Which level of organization is present in all life forms?

• organ

• tissue

• organelle

• cell

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The name of the element with 2 electrons, 6 protons, and 7 neutrons is:

• carbon

• magnesium

• nitrogen

• fluorine

• helium

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Which type of bond is shared between an atom of C and and atom of H?

• metallic

• hydrogen

• ionic

• nonpolar

• polar

What type of interaction is likely to occur between two water molecules or two strands of DNA?

• both hydrogen and covalent

• covalent

• hydrogen

• ionic

• both hydrogen and ionic

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Which of the following statements abput hydrogen bonding is correct?

• they have little importance in biology

• they involve hydrogen interacting with N, F, or O

• they have very strong true bonds that involve two or more metals

• they are the bonds that keep O and H together within a single molecule of water

Which of the following sets are LEAST likely to be attracted to each other?

• water and an ionic compound (e.g. table salt)

• a positive ion and a negative ion

• two polar molecules

• two nonpolar molecules

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What is NOT a characteristic of water that makes it a good candidate for the basis of life on earth?

• a molecule of water is completely uncharged and nonreactive

• many different compounds will dissolve in water

• at typical atmospheric pressure, water can exist as a solid, with a liquid, or a gas

• water has high specific heat (i.e. it takes a lot of energy to heat up water)

Two molecules with identical molecular formulas but different structures are called:

• monomers

• polymers

• isomers

• dimers