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Lecture Exam Practice Test 2

Total questions: 67

Worksheet time: 50mins

Name
Class
Date
1.

Which of the following organelles contains digestive enzymes?

a)

Lipases

b)

Peroxisome

c)

Ribosome

d)

Lysosomes

2.

Which organelle is involved in the synthesis of proteins?

a)

Ribosome

b)

Golgi Apparatus

c)

Lysosome

d)

Peroxisome

3.

Which of the following is NOT a reason cells are very small?

a)

To decrease surface area for entry and exit of materials

b)

To allow efficient diffusion of nutrients

c)

To maintain a favorable surface area to volume ratio

d)

To increase surface area for entry and exit of materials

4.

What is the main function of centrioles?

a)

Cell Division

b)

Cell Movement

c)

Storage

d)

Structural Support

5.

Which of the following is NOT found in a prokaryotic cell?

a)

Nucleus

b)

Cell Wall

c)

Flagella

d)

Plasma Membrane

6.

Whihc junction allows molecules to pass directly between animal cells?

a)

Tight Junction

b)

Hollow Junction

c)

Gap Junction

d)

Adherens Junction

7.

The fluid mosaic model describes the structure of the...

a)

Golgi Apparatus

b)

Nucleus

c)

Endoplasmic Reticulum

d)

Plasma Membrane

8.

Which of the following is NOT a component of the extracellular matrix in animal cells?

a)
Fibronectin
b)

Lysosomes

c)

Collagen

d)

Proteoglycans

9.

Which of the following connect the nuclear envelope to the cell's plasma membrane?

a)

Actin Filaments

b)

Microtubules

c)

Intermediate Filaments

d)

Microfilaments

10.

Vesicles transporting proteins leave the ___ and move to the ___.

a)

Endoplasmic Reticulum; Lysosome

b)

Endoplasmic Reticulum; Golgi Apparatus

c)

Golgi Apparatus; Plasma Membrane

d)

Nucleus; Golgi Apparatus

11.

Plant cells are surrounded by a...

a)

Cell wall

b)

Plasma membrane

c)

Glycocalyx

d)

Cell wall and plasma membrane

12.

Where does photosynthesis take place?

a)

Chloroplasts Stroma

b)

Thylakoid Membrfane

c)

Inner mitochondrial Membrane

d)

Plasma Membrane

13.

Which of the following is NOT a component found in both prokaryotic and eukaryotic cells?

a)

Plasma Membrane

b)

Cytoplasm

c)

Lysosomes

d)

Ribosomes

14.

Which microscope uses a beam of electrons to visualize cells?

a)

Light Microscope

b)

Electron Microscope

c)

Fluorescent Microscope

d)

Face Contrast Microsope

15.

Which of the following does NOT have a membrane-bound nucleus?

a)

Protists

b)

Plants

c)

Fungi

d)

Bacteria

16.

Which structure has a 9+2 arrangement of microtubules?

a)

Cilium and Flagellum

b)

Centriole

c)

Flagellum

d)

Cilium

17.

Which of the following values must be negative for a reaction to be spontaneous?

a)

T

b)

∆H

c)

∆G


d)

∆S

18.

The primary source of energy for humans is...

a)

Proteins

b)

Glycogen

c)

Glucose

d)

Fats

19.

Which thermodynamic parameter refers to unavailable energy?

a)

Activation Energy

b)

Temperature

c)

Entropy

d)

Enthalpy

20.

What sugar is part of the chemical structure of Adenosine Triphosphate (ATP)?

a)

Pentose

b)

Cellulose

c)

Glucose

d)

Ribose

21.

What form of energy is ultimately derived from the sun?

a)

Light

b)

Potential

c)

Heat

d)

Kinetic

22.

A calorie is a unit of energy. Specifically, a calorie is the amount of energy required to...

a)

raise the temperature of 1 GRAM of water by 1 degree FAHRENHEIT

b)

raise the temperature of 1 KILOGRAM of water by 1 degree CELSIUS

c)

raise the temperature of 1 GRAM of water by 1 degree CELSIUS

d)

raise the temperature of 1 KILOGRAM of water by 1 degree FAHRENHEIT

23.

The rate of an enzyme-catalyzed reaction depends directly on...

a)

Temperature

b)

Substrate Concentration

c)

pH

d)

All are correct

24.

ATP is considered the energy currency of the cell because...

a)

It is a long-term energy-storage molecule

b)

It can provide energy by hydrolysis for short term needs

c)

It is a monosaccharide

d)

It has unstable phosphate bonds is a monosaccharide

25.

Using the Free Gibbs Energy Diagram what can you conclude?

a)

∆G is zero

b)

∆G is positive

c)

∆G is negative 

d)

The graph do not provide enough information to make conclusions

26.

Using the Free Gibbs Energy Diagram below, what can you conclude?

a)

∆G is positive

b)

∆G is negative 

c)

∆G is zero

d)

The graph does not provide enough information to make conclusions.

27.

Energy is define as the capacity of do work, energy can be found in many forms, select the forms in which energy can exist (Select all that apply)

a)

Mechanical

b)

Sound

c)

Radioactivity

d)

Heat

28.

Competitive inhibitors do what?

a)

Block an allosteric site

b)

Denature the enzyme

c)

Alter the enzyme's shape

d)

Bind to the enzyme's active site

29.

What happens during oxidation in a redox reaction?

a)

Electrons are lost

b)

Electrons are gained

c)

Protons are gained

d)

Protons are lost

30.

In an endergonic reaction...

a)

The products have MORE energy than reactants

b)

The products have LESS energy than reactants

c)

Activation energy is ZERO

d)

The products and reactants have EQUAL free energy

31.

Energy flows into all biological entities in the world. What is the primal/main source of energy?

a)

ATP

b)

Thermodynamics

c)

The sun

d)

Metabolism

32.

In feedback inhibition, what builds up to inhibit an enzyme in a pathway?

a)

The end product

b)

The starting material

c)

An allosteric activator

d)

A cofactor

33.

The First Law of Thermodynamics explains that...

a)

Energy cannot be created or destroyed

b)

𝚫G = 𝚫H−T𝚫S

c)

There is no such things a perfect machine

34.

What process uses receptor proteins and coated vesicles to transport specific molecules?

a)

Pinocytosis


b)

Receptor-mediated endocytosis

c)

Exocytosis

d)

Phagocytosis

35.

Do the hydrophobic tails of phospholipids point toward the exterior of the membrane?

a)

True

b)

False

36.

Does the fluidity of membranes decrease at warmer temperatures?

a)

True

b)

False

37.

Isotonic solutions have the same solute concentrations inside and outside the cell.

a)

True

b)

False

38.

Does endocytosis bring materials into the cell?

a)

True

b)

False

39.

Which of the following membrane components can move laterally within the membrane?

a)

Integral proteins

b)

Peripheral proteins

c)

Cholesterol

d)

Phospholipids

40.

Bulk transport of large molecules uses which process?

a)

Solute pumping

b)

Simple Diffusion

c)

Exocytosis

d)

Osmosis

41.

Does water easily diffuse across cell membranes?

a)

True

b)

False

42.

Exocytosis releases material outside of the cell.

a)

True

b)

False

43.

What causes the membrane surfaces to face the cytoplasm and extracellular fluid?

a)

Covalent bonding


b)

Hydrophilic interactions

c)

van der Waals forces

d)

Hydrophobic interactions

44.

What is the role of aquaporins?

a)

Carbohydrate transport

b)

Protein transport

c)

Ion transport

d)

Water transport

45.

What causes the crenation of red blood cells in hypertonic solutions?

a)

Denaturation of membrane proteins

b)

Increased membrane permeability

c)

Expansion due to water uptake

d)

Shrinking due to water loss

46.

What causes transmembrane proteins to be embedded in the membrane?

a)

Ionic interactions

b)

Hydrogen boonding

c)

Hydrophobic R groups

d)

Hydrophilic surfaces

47.

Does phagocytosis engulf large particles?

a)

True

b)

False

48.

Does turgor pressure in plant cells push against the cell wall?

a)

True

b)

False

49.

What causes a cell to swell and potentially burst in a hypotonic solution?

a)

Active transport

b)

Osmosis

c)

Diffusion

d)

Facilitated diffusion

50.

How does the sodium-potassium pump function?

a)

Osmosis

b)

Facilitated diffusion

c)

Active transport

d)

Passive diffusion

51.

What characteristic of water allows it to pass through cell membranes?

a)

High molecular weight

b)

Hydrogen bonding

c)

Nonpolarity

d)

Hydrophobic interactions

52.

Channel proteins require a carrier to transport molecules.

a)

TRUE

b)

FALSE

53.

Water can easily diffuse across cell membranes.

a)

TRUE

b)

FALSE

54.

Integral membrane proteins penetrate through the entire membrane.

a)

TRUE

b)

FALSE

55.

How does cholesterol affect membrane fluidity?

a)

Increases fluidity by disrupting phospholipid packing

b)

Prevents phospholipid flipping between membrane leaflets

c)

Binds to hydrophilic heads of phospholipids

d)

Decreases fluidity by strengthening hydrophobic interactions

56.

Glycoproteins and glycolipids act as receptors on the cell surface.

a)

TRUE

b)

FALSE

57.

Phagocytosis engulfs large particles.

a)

TRUE

b)

FALSE

58.

Energy flows into all biological entities in the world. What is the primal (Main) source of energy:

a)

ATP

b)

Metabolism

c)

Thermodynamics

d)

Sun

59.

Enzymes change shape when:

a)

Inhibitors bind to an allosteric site

b)

Substrates bind to the active site

c)

Coenzymes are oxidized

d)

The pH decreases

60.

Which of the following best describes what a food Calorie (kilocalorie) measures?

a)

The weight of a food

b)

The mass of a food

c)

The usable energy content of a food

d)

The protein content of a food

61.

Catabolic pathways:

a)

Assemble complex molecules

b)

Synthesize ATP

c)

Always require energy input

d)

Break down molecules

62.

Which organelle is believed to have evolved from ancient prokaryotic cells?

a)

Ribosome

b)

Golgi apparatus

c)

Mitochondrion

d)

Endoplasmic reticulum

63.

Which junction forms a BARRIER regulating passage of materials between animal cells?

a)

Tight junction

b)

Gap junction

c)

Adherens junction

d)

Desmosome

64.

Which filament makes up the SPINDLE FIBERS during cell division?

a)

Actin filaments

b)

Intermediate filaments

c)

Microtubules

d)

Microfilaments

65.

According to the cell theory, which of the following is NOT true?

a)

All cells have common basic features

b)

All living things are made of cells

c)

Cells can arise spontaneously from nonliving matter

d)

Cells only come from division of preexisting cells

66.

Which of the following organelles contains digestive enzymes?

a)

Lipases

b)

Peroxisome

c)

Ribosome

d)

Lysosome

67.

What causes muscle contraction?

a)

Dynein

b)

Myosin

c)

Tubulin

d)

Kinesin

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