Answers HVA 26-27 IM Biology ALab: Identifying Nutrients

Lab: Identifying Nutrients — Unit test Answers

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Which of the following is a characteristic of a typical carbon atom?

Carbon has a high melting point.

Carbon dissolves easily in water.

Carbon can form single, double, and triple bonds.

Carbon is one of the least common elements in the universe.

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Which statement best illustrates a biotic or an abiotic factor that is often found in a city park?

Decaying leaves are an abiotic factor because they are living.

Rocks are an abiotic factor because they have never been alive.

Water in ponds is a biotic factor, because it provides a habitat for living things.

Oxygen is a biotic factor, because it is required for life and found in all living things.

Which compound contains a triple bond?

2 C's are connected with a single line, and each has an H attached by a single line above, below, and outside.

2 C's are connected with 2 parallel lines. There are H's connected with single lines above left, above right, below right, and below left of the 2 C's.

A C is connected to an O with 2 parallel vertical lines, and below left to H with a single line and below right to O H with a single line.

2 C's are connected by 3 parallel lines. There is an H connected with a single line to the left and to the right.

Which of the following best states the difference between an alcohol and an ether?

In an alcohol, a carbon atom is double bonded to an oxygen atom; in an ether, a carbon atom is triple bonded to another carbon atom.

In an ether, a carbon atom is double bonded to an oxygen atom; in an alcohol, a carbon atom is triple bonded to another carbon atom.

In an alcohol, a carbon atom is single bonded to a hydroxide group (OH–); in an ether, an oxygen atom is single bonded to two carbon atoms.

In an ether, a carbon atom is single bonded to a hydroxide group (OH–); in an alcohol, an oxygen atom is single bonded to two carbon atoms.

Which type of macromolecule is made up of subunits that are called amino acids?

carbohydrate

lipid

nucleic acid

protein

Which statement describes one way that RNA differs from DNA?

One is a protein, and the other is a nucleic acid.

They contain different five-carbon sugars and a different nitrogenous base.

They are both carbohydrates, but one is a polysaccharide.

One provides energy, and the other carries genetic information.

A lion eating a zebra is an example of which characteristic of life?

having cells

responding to the environment

using energy

growing and developing

The structural formula of an unsaturated fatty acid resembles the following diagram.Which of these is a geometric isomer of the above compound?

A chain of 7 C atoms has the left end bonded above to O H and double bonded below to O. The fourth and fifth C are double-bonded to each other and have H below but not above; all other C's have H above and below, and the right-end C has H to the right.

A chain of 7 C atoms has H to the left, above, and below, except the third and fourth C are double-bonded to each other and only have O above; the final C in the chain has no H, but is double bonded above to O and single bonded below to O H.

A chain of 7 C atoms has the left end double-bonded above to O and single bonded below to O H. The fourth and fifth C are double-bonded to each other. The fourth C has H above only, and the fifth C has H below only; all other C's have H above and below, and the right-end C has H to the right.

A chain of C atoms has H above, below and to the right; the left most C has instead O double-bonded above and O H single-bonded below,

Which of the following best states the difference between an alcohol and an ether?

In an alcohol, a carbon atom is double bonded to an oxygen atom; in an ether, a carbon atom is triple bonded to another carbon atom.

In an ether, a carbon atom is double bonded to an oxygen atom; in an alcohol, a carbon atom is triple bonded to another carbon atom.

In an alcohol, a carbon atom is single bonded to a hydroxide group (OH–); in an ether, an oxygen atom is single bonded to two carbon atoms.

In an ether, a carbon atom is single bonded to a hydroxide group (OH–); in an alcohol, an oxygen atom is single bonded to two carbon atoms.

Which statement describes one way that RNA differs from DNA?

One is a protein, and the other is a nucleic acid.

They contain different five-carbon sugars and a different nitrogenous base.

They are both carbohydrates, but one is a polysaccharide.

One provides energy, and the other carries genetic information.

Which level of organization is characterized by a group of cells that work together to perform a common function?

organ

tissue

organ system

organism

Which is abiotic?

tree sap

insect

sunlight

tree stump

The brothers pictured below are identical twins.The boys in this picture look alike because their bodies contain identical

carbohydrates.

lipids.

nucleic acids.

proteins.

A dietician examines the diet of a patient who is complaining that he is unable to build muscle mass. The patient eats mainly fresh fruits, vegetables, pasta, bread, and some fats and oils. Which type of supplement will the dietician most likely recommend?

citric acid

fatty acids

nucleic acids

amino acids