Long test Ung Naka Caps Ung Naka Underline

Question 1

1. Which of the following is NOT a primary function of the cell membrane
   A. Regulation of substance transport
   B. Cell signaling and communication
   C. Energy production through photosynthesis
   D. Maintaining cell shape and structure

Answer 1

C. Energy production through synthesis

Question 2

2. The fluid mosaic model describes the cell membrane as
   A. A rigid, static structure
   B.A flexible, dynamic structure composed of lipids and
   proteins
   C. A single layer of phospholipids
   D. A structure primarily composed of carbohydrates

Answer 2

B. A flexible, dynamic structure composed of lipids and proteins

Question 3

3. Phospholipids are amphipathic molecules, meaning they:
   A. Are completely hydrophobic
   B. Are completely hydrophilic
   C. Have both hydrophobic and hydrophilic regions
   D. Are only found in bacterial cells that can only live in water

Answer 3

C. Have both hydrophobic and hydrophilic regions

Question 4

4. Facilitated diffusion differs from simple diffusion in that facilitated diffusion
   A. Requires energy input
   B. Moves substances against their concentration gradient
   C. Utilizes membrane proteins to transport substances
   D. Only transports water molecules

Answer 4

C. Utilizes membrane proteins to transport substances

Question 5

5. Which of the following is an example of active transport?
   A. Osmosis
   B. Simple diffusion
   C. Receptor-mediated endocytosis
   D. Facilitated diffusion of glucose

Answer 5

C. Receptor-Mediated Endocytosis

Question 6

6. Which of the following types of transport across the cell membrane does NOT require energy?
   A. Active transport
   B. Endocytosis
   C. Facilitated diffusion
   D. Exocytosis

Answer 6

C. Facilitated diffusion

Question 7

7. What happens to an animal cell placed in a hypotonic solution?
   A. It shrinks
   B. It remains unchanged
   C. It becomes more rigid
   D. It swells and may burst (lyse)

Answer 7

D. It swells and may burst (lyse)

Question 8

8. Which type of endocytosis involves the engulfment of large particles or cells?
   A. Pinocytosis
   B. Receptor-mediated endocytosis
   C. Phagocytosis
   D. Exocytosis

Answer 8

C. Phagocytosis

Question 9

9. Which of the following is NOT a type of membrane transport protein?
   A. Channel protein
   B. Carrier protein
   C. Glycolipid
   D. Pump protein

Answer 9

C. Glycolipid

Question 10

10. Which statement best describes the
    arrangement of phospholipids in a cell membrane?
    A. Hydrophilic heads facing inward, hydrophobic tails
    facing outward
    B. Hydrophilic heads facing outward, hydrophobic tails
    facing inward
    C. Hydrophilic heads and hydrophobic tails randomly
    arranged
    D. Hydrophobic tails only, with hydrophilic heads

Answer 10

B. Hydrophilic heads facing outward, hydrophobic tails
facing inward

Question 11

11. The selective permeability of the cell membrane is primarily due to:
    A. The hydrophobic nature of the phospholipid bilayer.
    B. The presence of carbohydrates
    C. The action of peripheral proteins
    D. The presence of a cell wall (in plant cells).

Answer 11

A. The hydrophobic nature of the phospholipid bilayer.

Question 12

12. A cell placed in an isotonic solution will:
    A. Gain water and swell.
    B. Lose water and shrink
    C. Maintain its original size and shape.
    D. Undergo rapid changes in membrane potential.

Answer 12

C. Maintain its original size and shape.

Question 13

13. Which process requires the expenditure of ATP
    to move molecules across the cell membrane?
    A. Simple diffusion
    B. Osmosis
    C. Facilitated diffusion
    D. Active transport

Answer 13

D. Active transport

Question 14

14. Receptor-mediated endocytosis is a specific type of
    endocytosis that
    A. Engulfs large particles.
    B. Involves the uptake of extracellular fluid.
    C. Uses receptor proteins to bind to specific molecules.
    D. Is non-selective in the molecules it takes up.

Answer 14

C. Uses receptor proteins to bind to specific molecules.

Question 15

15. Membrane proteins can function as
    A. Transporters
    B. Receptors
    C. Enzymes
    D. All of the above

Answer 15

D. All of the above

Question 16

16. Which type of lipid is most abundant in animal
    cell membranes and contributes to membrane fluidity?
    A. Triglycerides
    B. Phospholipids
    C. Cholesterol
    D. Waxes

Answer 16

C. Cholesterol

Question 17

17. What is the primary driving force for simple diffusion?
    A. ATP hydrolysis
    B. Concentration gradient
    C. Membrane potential
    D. Osmotic pressure

Answer 17

B. Concentration gradient

Question 18

18. The cell membrane is primarily composed of
    A. Carbohydrates and proteins
    B. Lipids and proteins
    C. Nucleic acids and lipids
    D. Carbohydrates and nucleic acids

Answer 18

B. Lipids and proteins

Question 19

19. A cell is placed in a hypertonic solution. What
    will happen?
    A. Water will move into the cell, causing it to swell.
    B. Water will move out of the cell, causing it to shrink.
    C. There will be no net movement of water.
    D. The cell will burst.

Answer 19

B. Water will move out of the cell, causing it to shrink.

Question 20

20. What is the main function of membrane
    proteins called “channels”?
    A. To actively transport molecules across the membrane
    B. To facilitate the passive transport of specific
    molecules across the membrane
    C. To act as receptors for signal molecules
    D. To provide structural support for the membrane

Answer 20

B. To facilitate the passive transport of specific
molecules across the membrane

Question 21

21. A process wherein cells take in
    food particles through active transport.

Answer 21

Phagocytosis

Question 22

22. A type of Passive Transport that transport water across the cell membrane.

Answer 22

Osmosis

Question 23

23. These molecules are often
    insoluble in water due to their nonpolar nature. They
    include triglycerides, phospholipids, and steroids.

Answer 23

Lipids

Question 24

24. These molecules are the main
    energy storage form in plants.

Answer 24

Starch

Question 25

25. These molecules are the main
    energy storage form in animals.

Answer 25

Glycogen

Question 26

26. These molecules provide structural support in plant cell walls.

Answer 26

Cellulose

Question 27

27. Refers to building blocks of
    Proteins.

Answer 27

Amino Acids

Question 28

28. These molecules contain a ribose sugar and can be single-stranded or double-stranded.

Answer 28

Nucleic Acids

Question 29

29. These molecules contain a
    deoxyribose sugar and are typically double-stranded.

Answer 29

DNA

Question 30

30. This molecule is a type of protein that acts as a hormone. It regulates blood sugar levels by
    binding to receptors on target cells, triggering a cascade
    of events that lead to glucose uptake.

Answer 30

Insulin

Question 31

True or False
31. Phospolipids Bilayer is HYDROPHILIC

Answer 31

TRUE

Question 32

True or False
32. Nucleotide have 3 components
which are five carbon sugar, CARBOXYL bases, and
phosphate group.

Answer 32

Nitrogenous Bases

Question 33

True or False
33. dna is SINGLE-STRANDED molecules that contains genetic code for building protein.

Answer 33

Double-Stranded

Question 34

True or False
34. Enzymes are LIPIDS that act as
catalyst, speeding up chemical reactions in cell.

Answer 34

Protein

Question 35

True or False
35. RNA is double-stranded molecules that contains genetic code for building protein.

Answer 35

DNA

Question 36

True or False
36. GLYCOGEN is the main energy
storage form in plants.

Answer 36

Starch

Question 37

True or False
37. facilitated diffusion is a type of
PASSIVE transport.

Answer 37

True

Question 38

True or False
38. Phagocytosis means cell-eating.

Answer 38

True

Question 39

True or False
39. starch is a MONOSACCHARIDE that stores energy in plants.

Answer 39

Polysaccharides

Question 40

True or False
40. the combination of glucose and
galactose is called LACTOSE

Answer 40

True