AnswersEDG Biology A wLabTest

Test — Test Answers

4 verified answers
1
Free Preview

Which type of molecule that can be found in living things lacks carbon atoms?

A
protein
B
carbohydrate
C
fat
D
water
2
Free Preview

Which statement about enzymes is true?

A
An enzyme functions to decrease the rate of a chemical reaction.
B
Enzymes are proteins that function as catalysts in nonliving things.
C
Each enzyme can catalyze many different biochemical reactions.
D
Enzymes and substrates fit together like a lock and key.
3

A scientist is examining the role of an element found in fats and carbohydrates of living things. This element makes up 65% of human body mass. Which statement describes the element he is studying?

A
He is studying oxygen, which can also be found in proteins.
B
He is studying oxygen, which is the most abundant element in the atmosphere.
C
He is studying nitrogen, which can also be found in proteins.
D
He is studying nitrogen, which is the most abundant element in the atmosphere.
4

Which statement describes the phospholipid bilayer that makes up a cell membrane?

A
The hydrophobic heads point into and out of the cell, while the hydrophilic tails form a layer between the heads.
B
The hydrophobic tails point into and out of the cell, while the hydrophilic heads form a layer between the tails.
C
The hydrophilic heads point into and out of the cell, while the hydrophobic tails form a layer between the heads.
D
The hydrophilic tails point into and out of the cell, while the hydrophobic heads form a layer between the tails.
5

In these chemical compounds, C is for carbon, O is for oxygen, N is for nitrogen, and H is for hydrogen.Which chemical compound is most likely inorganic?

A
H2O
B
CH3NH2
C
C6H12O6
D
CH4
6

Which type of protein will fight disease?

A
insulin
B
antibodies
C
ligaments
D
genes
7

What would most likely happen if an error occurred when RNA was receiving coding information?

A
Proteins would be formed incorrectly.
B
DNA would form incorrectly.
C
RNA could not form a correct blueprint.
D
The incorrect amino acid would form.
8

Which general formula can be used to identify carbohydrates?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
9

Cell membranes are primarily made of a component that contains fatty acids. This component is most likely a...

A
carbohydrate.
B
protein.
C
nucleic acid.
D
lipid.
10

Which will increase the rate of a chemical reaction?

A
adding a catalyst
B
decreasing the pressure
C
decreasing the temperature
D
removing a catalyst
11

A scientist is examining the function of macromolecules in a cell. She notices that movement of large molecules into and out of the cell is disrupted when she damages one specific type of macromolecule. Which macromolecule has she most likely damaged?

A
a carbohydrate
B
a steroid
C
a nucleic acid
D
a protein
12

A patient has diabetes, a disease that causes high blood sugar levels. Which macromolecule will a dietician monitor most closely in a patient that has the disease?

A
carbohydrates
B
lipids
C
nucleic acids
D
proteins
13

What would most likely happen to a person who is not getting enough essential amino acids in his or her diet?

A
The body would synthesize the amino acids.
B
Muscle growth and repair would be limited.
C
Stored protein would break down.
D
The formation of proteins would increase.
14

Which is released during the formation of a peptide bond?

A
a five-carbon sugar
B
an amino group
C
an amino acid
D
a water molecule
15

Which element is found in both DNA and protein?

A
sulfur
B
sodium
C
nitrogen
D
chlorine
16

The graph below compares the rates of reaction of a burning candle and an exploding firework.What can you conclude from the graph?

Question illustration
A
The reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn.
B
The reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn.
C
The reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn.
D
The reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn.
17

A scientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas. Which group of statements best describe all of the materials he is using in the investigation?

A
They are each compounds. Each of the compounds is made of atoms. All of the atoms are made of matter.
B
They are each made of matter. Some are compounds and some are elements. They all contain atoms.
C
They are all elements. Some contain molecules of the same type of atom. Some contain different types of atoms.
D
They are each made of matter. Some are compounds made of one type of element. Some are pure atoms.
18

This chart shows four atoms, labeled W, X, Y, and Z. These atoms can combine with each other to form molecules.

Question illustration
A
W and X
B
X and Y
C
W and Z
D
Y and Z
19

Hemophilia is a disease that causes uncontrollable bleeding. If a father has it, all of his daughters will be carriers of the disease. Which macromolecule is involved in how hemophilia is passed from parents to their children?

A
carbohydrate
B
lipid
C
nucleic acid
D
protein
20

Which statement best describes the relationship between activation energy and rate of reaction?

A
Increasing the activation energy can increase the rate of a reaction.
B
Reducing the activation energy can increase the rate of a reaction.
C
Increasing the reaction energy does not alter the rate of reaction.
D
Reducing the activation energy can decrease the rate of a reaction.

Did you find these answers helpful?

More from this Course

Quiz
25 verified answers

Prokaryotic and Eukaryotic Cells

Quiz
25 verified answers

Unit Test

Quiz
25 verified answers

Unit Test