Unit Test — Unit test Answers

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

A
organ
B
tissue
C
organ system
D
organism
2
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The diagram shows a straight chain of glucose molecules. Which carbohydrate is shown above?

Question illustration
A
fructose
B
sucrose
C
galactose
D
starch
3

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

A
Decaying leaves are an abiotic factor because they are living.
B
Rocks are an abiotic factor because they have never been alive.
C
Water in ponds is a biotic factor, because it provides a habitat for living things.
D
Oxygen is a biotic factor, because it is required for life and found in all living things.
4

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
5

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.
6

Which is abiotic?

A
tree sap
B
insect
C
sunlight
D
tree stump
7

Which statement describes how enzymes and substrates are related?

A
The enzyme influences the speed of change from substrate to product.
B
Enzymes are released as substrates in a chemical reaction.
C
An enzyme is a special kind of substrate in a chemical reaction.
D
Substrates combine with enzymes to form reactants.
8

In which part of the body is glycogen stored?

A
liver
B
blood
C
pancreas
D
exoskeleton
9

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

A
All proteins contain carbon, hydrogen, oxygen, and nitrogen.
B
All carbohydrates contain carbon, hydrogen, and oxygen.
C
Nucleic acids are polymers with nucleotide monomers.
D
The helical structure of DNA is essential for protein production.
10

How does a catalyst influence a chemical reaction?

A
It speeds up or slows down a chemical reaction by direct participation.
B
It reacts with products to increase the concentration of reactants.
C
It decreases the amount of energy necessary for the reaction to proceed.
D
It increases the total amount of products formed.
11

Which reaction is exothermic?

A
a reaction that absorbs energy from the environment
B
a reaction that requires an activation energy
C
a reaction that releases energy into the environment
D
a reaction that does not involve a change in energy
12

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
13

Which recent discovery led to a new understanding of how genetic mutations increase the risk of cancer?

A
double helix structure of DNA
B
BRCA1 and BRCA2 genes
C
nucleic acid monomers
D
formation of tumor suppressor proteins
14

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

A
having cells
B
responding to the environment
C
using energy
D
growing and developing
15

A Venn diagram can be used to compare and contrast nucleic acids.Which characteristic would be correctly found in B?

Question illustration
A
contain ribose
B
consist of two strands
C
made of nucleotides
D
have an R group

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