AnswersHSBIO Biology Sem 1 26-27Unit Test

Unit Test — Unit test Answers

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Organisms contain different levels of organization within their bodies. Arachnoidiscus ehrenbergi, pictured below, is a single-celled organism that is part of the group of algae known as diatoms. Photo by Gordon T. Taylor, courtesy of the NOAAWhich level of organization is seen in both Arachnoidiscus ehrenbergi and the human stomach?

Question illustration
A
cell
B
tissue
C
organ
D
organ system
2
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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
3

The heart is an example of which level of organization within an organism?

A
cell
B
organ
C
tissue
D
organ system
4

Acetic acid, an organic compound, has the following structural formula.What is the chemical formula for acetic acid?

Question illustration
A
CHO
B
C2H4O2
C
C2OH
D
C2O2H
5

What is a disadvantage of using a space-filling model to show a chemical compound?

A
Space-filling models provide a two-dimensional view of the molecule.
B
Space-filling models do not identify the number and type of bonds.
C
Space-filling models do not show all atoms in the molecule.
D
Space-filling models show information about composition but not structure.
6

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
7

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
8

Responding to the environment is a characteristic of life best shown by which example?

A
a human shivers on a cold day
B
a horse trots in a field
C
a dog swims in a pond
D
a cat licks its paws
9

Organisms may contain up to five levels of organization within their bodies. Which level of organization is best represented by the liver?

A
tissue
B
organ
C
organism
D
organ system
10

The molecular formula for methanol is CH3OH. Which model shows methanol? (black = carbon; red = oxygen; white = hydrogen)

A
Option
Option A
B
A space-filling model has a black atom with three white atoms bonded to a red atom with one white atom.
Option B
C
A ball and stick model has 2 black atoms bonded to each other. One has three white atoms bonded to it; the other has two white atoms, and a red atom bonded to a white atom.
Option C
D
A central red atom is bonded on each side to a black atom, each of which is bonded to 3 white atoms.
Option D
11

What are geometric isomers?

A
compounds that have the same types of atoms arranged in different orders
B
compounds that have the same number of carbon atoms arranged in different orders
C
compounds that have the same atoms arranged in the same order, but with different three-dimensional orientations
D
compounds that have the same atoms arranged in the same order, and have the same three-dimensional orientations
12

A dietician asks a patient about the food that the patient eats and makes the table below to summarize the results.MacromoleculeSuggested percentage of dietActual percentage of dietCarbohydrates45–65%70%Lipids20–35%5%Proteins10–35%25%Based on the table, what advice do you think that the dietician will give the patient?

A
The patient should increase the amount of lean meats (proteins) and decrease the amount of oils in his or her diet.
B
The patient should decrease the amount of lean meats (proteins) and increase the amount of oils in his or her diet.
C
The patient should decrease the amount of rice and pasta and increase the amount of oils in his or her diet.
D
The patient should decrease the amount of rice and pasta and increase the amount of lean meats (proteins) in his or her diet.
13

Which of the following best describes a possible carbon compound?

A
One carbon atom forms a quadruple bond with another carbon atom.
B
One carbon atom forms a double bond with an oxygen atom and two single bonds with two hydrogen atoms.
C
One carbon atom forms five single bonds with five hydrogen atoms.
D
One carbon atom forms a triple bond with another carbon atom and a double bond with an oxygen atom.
14

Which statement correctly compares nucleic acids and carbohydrates?

A
They both contain carbon, but only nucleic acids contain hydrogen.
B
They both contain carbon, hydrogen, and oxygen in a 1:2:1 ratio.
C
They both contain carbon, but only carbohydrates contain oxygen.
D
They both contain carbon, but only nucleic acids contain phosphorous.
15

How many isomers does hexane (C6H14) have?

A
four
B
five
C
six
D
seven
16

Which level of organization includes all the other levels of organization?

A
organ system
B
organism
C
tissue
D
cell
17

Sweating when it is hot outside is an example of which characteristic of life?

A
responding to the environment
B
using energy
C
reproducing
D
growing and developing
18

The picture shows a carafe of olive oil.What is one of the primary functions of this food in the body?

Question illustration
A
building proteins
B
storing energy
C
providing structure to cell walls
D
carrying genetic information
19

Which is one of the five characteristics of life?

A
having organs
B
containing tissues
C
growing and developing
D
spontaneously generating
20

Which characteristic of life best describes the process of photosynthesis?

A
using energy
B
containing cells
C
reproducing
D
growing and developing

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