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Practice Exam Answers

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21
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Which flow chart correctly organizes the structures of heredity, from least to most complex?

A
gene rightarrow chromosome rightarrow codon rightarrow DNA
B
DNA rightarrow codon rightarrow chromosome rightarrow gene
C
codon rightarrow gene rightarrow DNA rightarrow chromosome
D
chromosome rightarrow DNA rightarrow gene rightarrow codon
22
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Smooth muscle, which is a tissue made up of a type of specialized muscle cell, functions in which process?

A
skeletal movement
B
heart contraction
C
pumping of blood
D
food digestion
23

How does a catalyst influence a chemical reaction?

A
It increases the total amount of products formed.
B
It speeds up or slows down a chemical reaction by direct participation.
C
It reacts with products to increase the concentration of reactants.
D
It decreases the amount of energy necessary for the reaction to proceed.
24

Svetlana and her mother are very similar. Both have blonde hair, a love of scrapbooking, blue eyes, and a thin nose. Which statement most likely describes Svetlana’s traits?

A
Svetlana inherited her blue eyes from her mother, but her love of scrapbooking comes from her environment.
B
Svetlana inherited her love of scrapbooking from her mother, but her blue eyes come from her environment.
C
Svetlana inherited her blonde hair from her mother, but her thin nose comes from her environment.
D
Svetlana inherited her thin nose from her mother, but her blonde hair comes from her environment.
25

By which process do plants obtain carbon from the atmosphere?

A
cellular respiration
B
photosynthesis
C
consumption
D
decomposition
26

Which organ systems work together to help the body shiver in order to maintain homeostasis?

A
circulatory and muscular
B
respiratory and nervous
C
nervous and muscular
D
circulatory and respiratory
27

Which statement best describes the process of chemiosmosis and the direct result of its occurrence?

A
Hydrogen ions flow from the thylakoid down a concentration gradient through ATP synthase channels into the stroma. ADP is converted to ATP.
B
Hydrogen ions flow from the thylakoid against a concentration gradient through ATP synthase channels into the stroma. ADP is converted to ATP.
C
Hydrogen ions flow from the stroma down a concentration gradient through ATP synthase channels into the thylakoid. ADP is converted to ATP.
D
Hydrogen ions flow from the thylakoid down a concentration gradient through ATP synthase channels into the stroma. ATP is converted to ADP.
28

Which family members have red-green color blindness?

A
Sam, Tim, Bella, and Joshua
B
Ben, Jenny, Mike, Carol, Katie, and Chris
C
Sam, Joshua, and Tim
D
Lisa and Monica

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