Proteins and Nucleic Acids — Unit test Answers

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1
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What would most likely happen to plants if they did not have a waxy outer coating?

A
They would store more water in their leaves.
B
They would photosynthesize at a faster rate.
C
They would store more sugars in their leaves.
D
They would be harmed by insects and UV radiation.
2
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Which process is performed by both plants and animals to break down sugars to provide energy in the form of ATP?

A
photosynthesis
B
cellular respiration
C
consumption
D
decomposition
3

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?

A
citric acid
B
fatty acids
C
nucleic acids
D
amino acids
4

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

A
carbohydrate
B
lipid
C
nucleic acid
D
protein
5

Jun is at risk for heart disease so he is watching his cholesterol levels. He refers to the table below to choose what is best for his health.Comparison Chart of Fats Food (14 g)Saturated Fat (g)Monounsaturated Fat (g)Polyunsaturated Fat (g)Butter7.93.70.5Cream cheese3.01.50.2Margarine1.65.43.4Peanut butter1.44.02.6Which snack is the healthiest option for Jun, based on the data in the table?

A
bagel with butter
B
bagel with cream cheese
C
bagel with margarine
D
bagel with peanut butter
6

Where does a peptide bond form?

A
between the five-carbon sugar of one nucleotide and the phosphate group of another nucleotide
B
between the R group of one amino acid and the carboxyl group of another amino acid
C
between the amino group of one amino acid and the carboxyl group of another amino acid
D
between the nitrogenous base of one nucleotide and the phosphate group of another nucleotide
7

Which shows the most direct path that carbon can take through the carbon cycle?

A
plant ® atmosphere ® animal
B
animal ® plant ® atmosphere
C
plant ® animal ® atmosphere
D
atmosphere ® animal ® fossil fuel
8

The diagram shows a simple lipid.What type of lipid is shown?

Question illustration
A
saturated
B
unsaturated
C
phospholipid
D
triglyceride
9

Lactose (milk sugar) is a carbohydrate that is formed by combining galactose and glucose. Which term best describes this molecule?

A
monosaccharide
B
disaccharide
C
monomer
D
starch
10

A scientist is working with methane (CH4) and butane (C4H10). Which statement best compares these chemicals?

A
They are two different types of molecules that each contain the same number of atoms.
B
They are two different types of atoms that are each made up of a different number of elements.
C
They are compounds made of the same two elements, but each contain different numbers of atoms.
D
They are matter made of the same two compounds, but each contain different types of elements.
11

There are more hydrogen atoms in living organisms than any other atom, but oxygen is more abundant in terms of mass. Why is this statement true?

A
Hydrogen is a gas, but oxygen is a solid.
B
Hydrogen atoms have a lower mass than oxygen atoms.
C
Hydrogen atoms make up more of water's mass than oxygen atoms.
D
Hydrogen is present as single atoms and oxygen is bonded in compounds.

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