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Based on your knowledge of the polarity of water molecules, the solute molecule is most likely

positively charged.

Which of the following statements about ecology is incorrect?

Ecology is a discipline that is independent from natural selection and evolutionary history

The two molecules shown in the following figure are best described as

geometric isomers.

Atoms whose outer electron shells contain eight electrons tend to

be stable and chemically nonreactive, or inert

Which bond is closest to the N-terminus of the molecule?

Bond A

Which bond is closest to the C-terminus of the molecule?

Bond E

At which bond would water need to be added to achieve hydrolysis of the peptide, back to its component amino acid?

Bond C

The chemical reaction illustrated in the figure below results in the formation of a (an)

peptide bond.

A chemist wishes to make an organic molecule less acidic. Which of the following functional groups should be added to the molecule in order to do so?

amino

Polymers of polysaccharides, fats, and proteins are all synthesized from monomers by which process?

the removal of water (dehydration reactions)

One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3) Carbonic acid is a weak acid that dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+) Thus,H2CO3  HCO3- + H+If the pH of the blood drops, one would expect

the HCO3- to act as a base and remove excess H+ with the formation of H2CO3.

At which level of protein structure are interactions between the side chains (R groups. most important?

tertiary

One of the buffers that contribute to pH stability in human blood is carbonic acid H2CO3. Carbonic acid is a weak acid that when placed in an aqueous solution dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+) Thus, H2CO3  HCO3- + H+ If the pH of the blood increases, one would expect

a decrease in the concentration of H2CO3 and an increase in the concentration of H2O.

What is the reason why hydrocarbons are not soluble in water?

The majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages.

_The tertiary structure of a protein is the

unique three-dimensional shape of the fully folded polypeptide.

Which of the following terms includes all of the others?

biodiversity

Which of the following is possible due to the high surface tension of water?

A water strider can walk across the surface of a small pond.

Which of the following is an example of hydrolysis?

the reaction of a fat, forming glycerol and fatty acids with the utilization of water

What is the fundamental difference between matter and energy?

Matter is cycled through ecosystems; energy is not.

Observe the structures of glucose and fructose. These two molecules differ in the

arrangement of carbon, hydrogen, and oxygen atoms.

Observe the structures of glucose and fructose. These two molecules are

structural isomers.

The main decomposers in an ecosystem are

fungi and prokaryotes

Important abiotic factors in ecosystems include which of the following?

temperature, water, wind.

A cow's herbivorous diet indicates that it is a(n)

primary consumer.

Which of the following abiotic factors has the greatest influence on the metabolic rates of plants and animals?

temperature

Which of the following terms encompasses all of the others?

heterotrophs

Which of the following contains nitrogen in addition to carbon, oxygen, and hydrogen?

an amino acid such as glycine

To recycle nutrients, the minimum an ecosystem must have is

producers and decomposers.

Which two functional groups are always found in amino acids?

carboxyl and amino

Which of the following best describes the relationship between the atoms described below? Atom 1 Atom 2

They are isotopes

What do cohesion, surface tension, and adhesion have in common with reference to water?

All are properties related to hydrogen bonding

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