AnswersBiologyThe Building Blocks of Life

Practice Test Answers

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1
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Where does a peptide bond form?

A
between the nitrogenous base of one nucleotide and the phosphate group of another nucleotide
B
between the amino group of one amino acid and the carboxyl group of another amino acid
C
between the R group of one amino acid and the carboxyl group of another amino acid
D
between the five-carbon sugar of one nucleotide and the phosphate group of another nucleotide
2
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Which statement describes one way that RNA differs from DNA?

A
One is a protein, and the other is a nucleic acid.
B
They are both carbohydrates, but one is a polysaccharide.
C
One provides energy, and the other carries genetic information.
D
They contain different five-carbon sugars and a different nitrogenous base.
6

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

A
They would photosynthesize at a faster rate.
B
They would store more sugars in their leaves.
C
They would be harmed by insects and UV radiation.
D
They would store more water in their leaves.
7

A scientist is working with methane open paren CH sub 4 close paren and butane open paren cap c sub 4 cap h sub 10 close paren Which statement best compares these chemicals?

A
They are two different types of atoms that are each made up of a different number of elements.
B
They are matter made of the same two compounds, but each contain different types of elements.
C
They are two different types of molecules that each contain the same number of atoms.
D
They are compounds made of the same two elements, but each contain different numbers of atoms.
8

What type of lipid is estrogen?

A
steroid
B
phospholipid
C
triglyceride
D
wax
9

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

A
responding to the environment
B
using energy
C
growing and developing
D
having cells
10

What scientific knowledge about macromolecules is a direct result of Gerardus Johnannes Mulder’s 1838 discovery?

A
All carbohydrates contain carbon, hydrogen, and oxygen.
B
All proteins contain carbon, hydrogen, oxygen, and nitrogen.
C
The helical structure of DNA is essential for protein production.
D
Nucleic acids are polymers with nucleotide monomers.
13

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 atoms make up more of water's mass than oxygen atoms.
B
Hydrogen is a gas, but oxygen is a solid.
C
Hydrogen is present as single atoms and oxygen is bonded in compounds.
D
Hydrogen atoms have a lower mass than oxygen atoms.
14

In which part of the body is glycogen stored?

A
blood
B
pancreas
C
liver
D
exoskeleton
16

By which process does water vapor become a cloud?

A
transpiration
B
condensation
C
precipitation
D
evaporation

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