1)

 Proteins are composed of chains of _____________ which are joined together with peptide bonds.

A)
fatty acids

B)
amino acids

C)
nucleic acids

D)
monosaccharides

2)

 Channels within the structure of the cell membrane are composed of

A)
carbohydrates.

B)
disaccharides.

C)
phospholipids.

D)
proteins.

3)

 The central vacuole in a plant cell is responsible for turgor pressure. When the vacuole loses water the cytoplasm “shrinks”. When the vacuole gains water the cytoplasm seems to “puff up”. One structure helps the plant cell keep its shape no matter how much water is in the vacuole. This is the

A)
cell wall.

B)
cytoplasm.

C)
cytoskeleton.

D)
cell membrane.

4)

 Proteins are

A)
built in the nucleus by DNA and transported to the ribosomes.

B)
converted from nucleic acids to amino acids in the nucleolus.

C)
produced in the lysosomes and transported out of the cell by vacuoles.

D)
transported to other parts of the cell by the endoplasmic reticulum from ribosomes.

5)

 The organelle identified in the picture as #10 helps the cell maintain homeostasis in what way? This organelle is the 
smallerwhite circularly shaped organelle found in the top middle of the image.

A)
aids the cell in movement

B)
produces energy for cellular processes

C)
houses the cell’s DNA for reproduction

D)
storage of needed components or cellular waste

6)

 Aquatic salamanders and tadpoles obtain oxygen from water when it passes over the gill filaments.
Which condition would lead to maximum absorption of O
2 by the gills?

A)
low oxygen in the water, low oxygen in the blood

B)
low oxygen in the water, high oxygen in the blood

C)
high oxygen in the water, low oxygen in the blood

D)
high oxgyen in the water, high oxygen in the blood

7)

Cell Organelles

Organelle/Part
Where found
Function

Cell membrane
All cells
Support Protection Controls movement of materials in/out of cell Barrier between cell and its environment Maintains homeostasis

Cell wall
Plant, Fungi, & Bacteria,
Support (grow tall) Protection

Cytoplasm
All cells
Supports and protects cell organelles

Nucleus
All cells except prokaryotes
Controls cell activities Contains the hereditary material of the cell

Mitochondria
All cells except prokaryotes
Site of aerobic cellular respiration

Ribosome
All cells
Site of protein synthesis

Chlorplast
Plant cells, some prokaryotes
Site of photosynthesis

Vacuole
Plant and animal cells
Store food, water, metabolic & toxic wastes Store large amounts of food or sugars in plants

Lysosome
Common in animal cells
Breaks down larger food molecules into smaller molecules Digests old cell parts

Flagella
Some bacteria, protists, and animal cells
Movement

 You are running on the school’s cross country team. We would expect your 
muscle cells to contain many ____________ to produce cellular energy.

A)
lysosomes

B)
mitochondria

C)
nuclei

D)
ribosomes

8)

 Transport of materials into a cell against a concentration gradient, from low to high, requires

A)
water.

B)
energy.

C)
osmosis.

D)
a passageway.

9)

 Which of these organic molecules functions to help speed up biological chemical reactions?

A)
lipids

B)
proteins

C)
nucleic acids

D)
carbohydrates

10)

 A ___________ chain is a sequence of amino acids that is the foundation for the basic structure of a protein.

A)
polynomial

B)
polypeptide

C)
polysaccharide

D)
polyunsaturated

11)

 Which compound is a reusable, complex protein that speeds up chemical reactions?

A)
starch

B)
a sugar

C)
a lipid

D)
an enzyme

12)

The diagrams show different stages of cell division in the somatic cells of a plant. The stages are not shown in order. 

 Which statement correctly lists the order of the stages?

A)
P, R, Q

B)
Q, R, P

C)
R, P, Q

D)
P, Q, R

13)

 The picture shows an experimental set up for the process of osmosis.
The potato has a cavity on top, as shown in the picture. Some sugar solution is poured into the cavity and the potato is placed in a beaker of water. After some time, it is observed that there is a rise in the level of liquid in the cavity. This confirms that

A)
water from the beaker has moved into the cavity.

B)
sugar has moved out of the sugar solution in the cavity.

C)
the sugar solution in the cavity has become more concentrated.

D)
there is equilibrium between the liquids in the beaker and the cavity.

14)

 The process of _____________ is modeled in the plant cell diagrams seen here.

A)
osmosis

B)
tonicity

C)
active transport

D)
facilitated transport

15)

Characteristics of RNA

Student
Deoxyribose
Ribose
Thymine
Uracil

Student 1
No
Yes
No
Yes

Student 2
Yes
No
No
Yes

Student 3
No
Yes
Yes
Yes

Student 4
Yes
No
Yes
No

 Four students are asked to list characteristics of RNA in a table as part of an assignment. Which student listed the characteristics correctly?

A)
student 1

B)
student 2

C)
student 3

D)
student 4

16)

 What is the function of a cell’s selectively permeable plasma membrane?

A)
It helps the cell to manufacture proteins.

B)
It regulates the amount of ATP the cell produces.

C)
It regulates what materials enter and leave the cell.

D)
It packages and stores most of the material in a cell.

17)

Cell Type Dichotomous Key
1a cell has a nucleus and organelles → go to # 2
1b cell has no nucleus or organelles → bacterial cell
2a cell has a cell wall → go to # 3
2b cell has no cell wall → animal cell
3a cell has chloroplasts → plant cell
3b cell has no chloroplasts → fungal cell

 What type of cell is C?

A)
animal

B)
bacterial

C)
fungal

D)
plant

18)

 Bacteria cells have no

A)
nuclei.

B)
cell membrane.

C)
reproductive means.

D)
method of locomotion.

19)

 ___________ can be used by cells to store energy, form biological membranes, and serve as chemical messengers.

A)
Carbohydrates

B)
Fructose

C)
Glucose

D)
Lipids

20)

 In cells, the production of proteins is handled by the ribosomes and endoplasmic reticulum, while the processing and packaging of proteins is handled by the _________ body.

A)
Golgi

B)
nuclear

C)
plastid

D)
cytoplasmic

Eliminate

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