EOCT practice Domain I: Cells

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EOCT practice Domain I Cells
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1. Cells use passive and active transport to move
materials across cell membranes in order to
maintain a constant internal environment. What is
the process of maintaining a constant internal
environment called?

• A diffusion
• B evolution
• C homeostasis
• D respiration

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2. Of the following, which is considered a living
organism?

• A bacterium
• B mitochondrion
• C nucleus
• D sperm

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3. Which of the following examples illustrates
osmosis?

• A Water leaves the tubules of the kidney in
  response to the hypertonic fluid surrounding the
  tubules.
• B Digestive enzymes are excreted into the small
  intestine.
• C White blood cells consume pathogens and cell
  debris at the site of an infection.
• D Calcium is pumped inside a muscle cell after
  the muscle completes its contraction

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4. Which of the following is NOT considered to be
living?

• A bacteria
• B viruses
• C amoeba
• D yeast

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5. Unlike prokaryotic cells, eukaryotic cells
have the capacity to

• A assemble into multicellular organisms
• B establish symbiotic relationships with other
  organisms
• C obtain energy from the Sun
• D store genetic information in the form of DNA

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Answers 1-5

1. C
2. A
3. A
4. B
5. A

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6. If placed in a hypertonic solution, a plant
cell will

• A swell
• B burst
• C shrink in size
• D remain constant in size

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7. As represented in the diagram below, bacteria
have cell walls like plant cells do. Unlike the
plant cell walls, however, the bacterial cell
wall is made of which of the following?

• A cellulose and starches
• B chitin and fats
• C sugars and amino acids
• D cellulose and sugars

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8. A type of cell that can exist in a broad range
of environmental conditions, can rapidly
multiply, and lacks a nucleus is known as what
type of cell?

• A animal
• B eukaryotic
• C plant
• D prokaryotic

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9. The function of the cell organelle circled
below is to produce energy. What is the name of
this organelle?

• A Golgi apparatus
• B mitochondrion
• C nucleus
• D ribosome

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10. The drawing below illustrates a small
portion of the molecules that make up a cell
membrane. The phospholipid molecules serve to

• A help cells recognize each other
• B allow glucose molecules into the cell
• C prevent the passage of certain molecules into
  the cell
• D line up amino acids for protein synthesis

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Answers 6-10

1. C
2. C
3. D
4. B
5. C

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11. Homeostasis is the maintenance of stable
conditions within the body. Which of the
following is a method of maintaining homeostasis
in the human body?

• A working in air conditioning
• B shivering when cold
• C eating balanced meals
• D sleeping regularly

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12. Water (H2O) is an example of a molecule whose
atoms are held together by which of the following?

• A covalent bonds
• B ionic bonds
• C metallic bonds
• D hydrogen bonds

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13. As illustrated below, the molecules of many
membranes are arranged with their polar heads to
the outside and their nonpolar tails to the
inside. With this arrangement, where would you
MOST likely find water molecules?

• A A only
• B B only
• C C only
• D A and C

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14. The movement of materials across a plasma
membrane through a protein is called

• A facilitated transport
• B diffusion
• C active transport
• D osmosis

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15. The graph shows a growth curve for a
population of Paramecium grown in a laboratory
culture. What is the approximate carrying
capacity for this population of Paramecium under
these conditions?

• A 500 Paramecium/mL
• B 700 Paramecium/mL
• C 900 Paramecium/mL
• D 1100 Paramecium/mL

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Answers 11-15

1. B
2. A
3. D
4. A
5. C

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16. Eukaryotic DNA is contained within the

1. Cell wall
2. Central vacuole
3. Nucleus
4. Endoplasmic reticulum

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17. Inside eukaryotic cells are membrane bound
structures called

1. Cell walls
2. Cilia
3. Organelles
4. cytoplasm

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18. The net movement of particles from an area of
higher concentration to an area of lower
concentration is known as

1. Diffusion
2. Exocytosis
3. Plasmolysis
4. Active transport

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19. The area into which a substrate fits on an
enzyme is called the

1. Active site
2. Product
3. Peptide bond
4. Covalent bond

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20. The assembly of proteins in a cell takes
place in the

• A nucleus
• B vacuoles
• C cytoplasm
• D mitochondria

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Answers 16-20

1. C
2. C
3. A
4. B
5. C

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21. Which of the following is an organism whose
cell(s) lack(s) membrane-bound organelles?

• A nucleolus
• B chromatin
• C eukaryote
• D prokaryote

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22. In all reptiles, birds, and mammals, the
processes of excretion, water and salt balance,
and the regulation of pH in body fluids are
controlled by the kidneys. This is an example of
the organism maintaining

• A reabsorption
• B homeostasis
• C insulation
• D hibernation

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23. Proteins are long chains or polymers made up
of

• A nucleotides
• B carbohydrates
• C amino acids
• D lipids

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24. Which of the following molecules provides the
greatest amount of energy per gram of mass when
metabolized?

• A carbohydrate
• B nucleic acid
• C protein
• D lipid

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25. Which of the following environmental changes
can cause an increase in the rates of reactions
in cells?

• A increased temperature
• B decreased enzyme concentrations
• C increase activation energy requirement
• D decreased diffusion rates

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Answers 21-25

1. D
2. B
3. C
4. D
5. A

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