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Concept 6- cells

Total questions: 65

Worksheet time: 33mins

Name
Class
Date
1.

Which statement best distinguishes magnification from resolution in microscopy?

a)

Magnification increases image clarity by reducing noise

b)

Magnification enlarges apparent size without improving detail

c)

Resolution enlarges specimens to match real size closely

d)

Resolution measures contrast differences across stained parts

2.

Which improvement most increases contrast in light microscopy when viewing cells?

a)

Using shorter wavelengths of light only

b)

Staining or labeling specific cell components

c)

Increasing magnification above 2,000×

d)

Switching to oil immersion objectives

3.

Match each microscope type to its primary use.

a)

Light microscope (LM)

1.

Viewing live cells with stained components

b)

Scanning electron microscope (SEM)

2.

Imaging surface topography in 3D-like detail

c)

Transmission electron microscope (TEM)

3.

Examining internal structures in thin sections

4.

Which pair correctly matches concept with definition?

a)

Magnification

1.

Ratio of image size to real specimen size

b)

Resolution

2.

Minimum distance to distinguish two points as separate

c)

Contrast

3.

Differences in sample parts accentuated by staining

d)

Cytology

4.

Study of cell structures with microscopes

5.

Which statement best explains why most cells are microscopic rather than large?

a)

Surface area grows faster than volume as cells enlarge

b)

Volume grows faster than surface area as cells enlarge

c)

Surface area and volume increase at the same rate in cells

d)

Cells stop metabolizing when they exceed a certain diameter

6.

Which feature distinguishes eukaryotic cells from prokaryotic cells?

a)

Circular DNA located in a nucleoid region

b)

Presence of membrane-bound organelles with specialized functions

c)

Smaller average size of individual cells

d)

Cell walls composed of peptidoglycan structures

7.

As a cell increases in size, what happens to its surface area-to-volume ratio?

a)

The ratio fluctuates randomly during growth

b)

The ratio decreases because volume increases faster

c)

The ratio increases steadily with cell growth

d)

The ratio remains constant regardless of size

8.

Which statement about the plasma/cell membrane is accurate?

a)

It stores most genetic instructions for the cell

b)

It acts as a selective barrier controlling exchanges

c)

It provides energy by cellular respiration directly

d)

It prevents all molecules from entering the cell

9.

Which description correctly contrasts cytosol and cytoplasm?

a)

Cytosol is the fluid; cytoplasm includes organelles

b)

Cytoplasm is fluid only; cytosol includes organelles

c)

Cytosol is outside the cell; cytoplasm is inside

d)

Both terms mean the same in all contexts

10.

What is chromatin best described as?

a)

A matrix of cytosolic fibers

b)

A ribosome subunit pair

c)

DNA with associated proteins

d)

Dense nucleolar granules

11.

Which cells are most likely to have many bound ribosomes?

a)

Pancreas secretion cells

b)

Muscle contraction cells

c)

Skin barrier cells

d)

Neuron signaling cells

12.

Which feature distinguishes smooth ER from rough ER?

a)

Lumen continuous with nucleus

b)

Attachment to nuclear envelope

c)

Lack of ribosomes on surface

d)

Presence of ribosomes on surface

13.

Which function is primarily associated with the smooth ER in liver cells?

a)

Folding nascent polypeptides

b)

Adding carbohydrates to proteins

c)

Detoxifying drugs and poisons

d)

Packaging proteins into vesicles

14.

Multiple processes occur in smooth ER. Which are true?

a)

Synthesis of oils and steroids

b)

Storage of calcium ions

c)

Addition of signal peptides

d)

Carbohydrate attachment forming glycoproteins

15.

Which statement best describes the Golgi apparatus role in the endomembrane system?

a)

It modifies, sorts, and ships cell products

b)

It digests macromolecules with enzymes

c)

It synthesizes proteins using ribosomes

d)

It generates ATP during cellular respiration

16.

Phagocytosis(moving solids into a cell) initially produces a food vacuole that

a)

Moves to the nucleus for storage

b)

Exits the cell through exocytosis

c)

Fuses with lysosomes for digestion

d)

Becomes the central vacuole in plants

17.

Which disease example illustrates a missing lysosomal enzyme leading to substrate buildup?

a)

Diabetes mellitus raising blood glucose

b)

Cystic fibrosis reducing chloride transport

c)

Sickle-cell anemia affecting hemoglobin

d)

Tay–Sachs disease accumulating lipids

18.

Which statement about plant central vacuoles is accurate?

a)

They generate ATP for cellular respiration

b)

They store cell sap distinct from cytosol

c)

They synthesize ribosomal RNA transcripts

d)

They fuse with lysosomes in animal cells

19.

Contractile vacuoles in freshwater protists primarily

a)

Pump excess water out to maintain water balance; found primarily in protists

b)

Create glucose through photosynthesis

c)

Break down lipids during starvation

d)

Transport proteins to the Golgi cis face

20.

What cellular advantage results from a large central vacuole in plant cells?

a)

Speeds lysosomal enzyme synthesis

b)

Raises cytosolic pH above neutrality

c)

Allows cell growth with minimal new cytoplasm

d)

Decreases surface area relative to volume

21.

Which statement about the number of mitochondria in cells is accurate?

a)

Number is fixed by organism’s genome size

b)

Number correlates with aerobic metabolic activity

c)

Number depends only on cell age

d)

All cells have exactly one mitochondrion

22.

Peroxisomes carry out oxidation reactions. Which byproduct is formed and then detoxified by peroxisomal enzymes?

a)

Nitric oxide

b)

Carbon dioxide gas

c)

Hydrogen peroxide

d)

Ammonia

23.

What is a role of liver peroxisomes in humans?

a)

Synthesize chlorophyll for photosynthesis

b)

Detoxify alcohol by transferring hydrogen to oxygen

c)

Replicate circular chromosomes

d)

Produce ribosomes for the cytosol

24.

What is the main role of centrosomes in many animal cells?

a)

Digest worn-out organelles

b)

Produce ATP for cellular energy

c)

Store calcium for muscle contraction

d)

Organize microtubule growth near nucleus

25.

During cell division, how do microtubules contribute?

a)

Pump ions across membranes

b)

Copy DNA with polymerase

c)

Anchor ribosomes to rough ER

d)

Separate chromosomes during mitosis

26.

Which features distinguish cilia from flagella in movement?

a)

Neither requires ATP energy

b)

Both move identically straight

c)

Flagella move with undulatory waves

d)

Cilia are shorter and cause the organisms to tumble in the water

27.

Cytoplasmic streaming in plant cells mainly results in what outcome?

a)

Thickens the cortex to stop movement

b)

Breaks down microtubules for mixing

c)

Creates circular flow speeding transport

d)

Halts material distribution across the cell

28.

Which structure primarily protects plant cells, maintains shape, and prevents excessive water uptake?

a)

Primary cell wall layer

b)

Plant cell wall overall

c)

Middle lamella region

d)

Plasma membrane bilayer

29.

Which intercellular junction forms continuous belts that prevent extracellular fluid leakage between animal cells?

a)

Gap junctions

b)

Plasmodesmata

c)

Desmosomes

d)

Tight junctions

30.

Desmosomes are best described as structures that:

a)

Digest ECM proteins

b)

Fasten cells into sheets

c)

Fuse membranes completely

d)

Create cytoplasmic channels

31.

Gap junctions permit passage of which types of molecules between adjacent animal cells?

a)

Ions

b)

Small signal molecules

c)

Sugars

d)

Large proteins

e)

Amino acids

32.

Shape, protection (2 ANSWERS)

a)

cell membrane

b)

cell wall

c)

ribosomes

d)

nuclear envelope

33.

Detoxify alcohol and other harmful compounds by transferring hydrogen from the poisonous compounds to oxygen

a)

peroxisomes

b)

lysosomes

c)

Golgi apparatus

d)

Smooth ER

34.

MAKES RIBOSOMES, MIGHT HAVE 2 OR MORE or A WHOLE BUNCH MAY PLAY A ROLE IN CONTROLLING CELL DIVISION

a)

nucleus

b)

nucleolus

c)

ribosomes

d)

rough ER

35.

CELLS WILL HAVE A LARGE NUMBER OF THESE (PANCREAS) and NOT MEMBRANE BOUNDED SO NOT CONSIDERED AN ORGANELLE

a)

ribosomes

b)

rough ER

c)

mitochondria

d)

lysosomes

36.

CAN BE FREE IN CYTOPLASM OR ATTACHED TO ER OR NUCLEAR ENVELOPE

a)

ribosomes

b)

rough ER

c)

smooth ER

d)

lysosomes

37.

FUNCTION IN DIVERSE METABOLIC PROCESSES and SYNTHESIS OF LIPIDS- OILS, STEROIDS, AND NEW CELL MEMBRANES; MAKES SEX HORMONES

a)

smooth ER

b)

rough ER

c)

peroxisomes

d)

l

38.

1.     METABOLISM OF CARBS

2.     DETOXIFY’S DRUGS AND POISONS, FOUND IN LIVER ELLS

3.     STORES CALCIUM IONS; USED IN CONTRACTION OF MUSCLES

a)

smooth ER

b)

rough ER

c)

ribosomes

d)

nuclear enveleope

39.

WAREHOUSE FOR RECEIVING, SORTING, SHIPPING, AND SOME MANUFACTURING and CONSISTS OF SACS CALLED CISTERNAE

a)

Golgi apparatus

b)

Smooth ER

c)

peroxisomes

d)

lysosomes

40.

gets rid of damaged cell parts and damaged ones cause Tay Sachs disease

a)

lysosomes

b)

peroxisomes

c)

smooth ER

d)

nucleolus

41.

It is a sack of enzymes that is used to digest macromolecules and work best in an acidic environment

a)

lysosomes

b)

peroxisomes

c)

cell wall

d)

cytoplasm

42.

Main job is for storage- has contractile, food, and central ones

a)

vacuole

b)

cell wall

c)

golgi apparatus

d)

ribosomes

43.

Gets rid of damaged cell parts and is found in WBC and destroys bacteria and other invaders

a)

lysosomes

b)

ribosomes

c)

rough ER

d)

cytoplasm

44.

has it's own DNA, comes from mom, and is used to make energy

a)

mitochondria

b)

peroxisomes

c)

lysosomes

d)

G

45.

Convert carbon dioxide and water to sugar and oxygen

a)

chloroplast

b)

mitochondria

c)

lysosomes

d)

cell wall

46.

sometimes called plastids, can pinch in two in order to reproduce themselves

a)

chloroplast

b)

ribosomes

c)

rough ER

d)

lysosomes

47.

detoxify alcohol and other harmful compounds by transferring hydrogen from the poisonous compounds to oxygen

a)

peroxisomes

b)

smooth ER

c)

lysosomes

d)

chloroplast

48.

contain enzymes that remove hydrogen atoms from various substrates and transfer them to oxygen  = H2O2 ; use oxygen to break fatty acids down for the mitochondria

a)

peroxisomes

b)

rough ER

c)

smooth ER

d)

cytskeleton

49.

These are fibers that extend through out the cytoplasm and isues for support and shape

a)

cytoskeleton

b)

cilia

c)

flagella

d)

cell wall

50.

composed of microtubules, microfilaments, and intermediate filaments and might help some cells move; usually the skeleton part

a)

cytoskeleton

b)

cilia

c)

cell wall

d)

perioxisomes

51.

Sperm cells have these- used for movement. Some bacteria can have one or multiple ones

a)

flagella

b)

cilia

c)

cytoskeleton

d)

cytoplasm

52.

line the oviducts helping move the egg towards the uterus, has power and recovery strokes, and can line the trachea

a)

cilia

b)

flagella

c)

ribosomes

d)

c

53.

Most are composedd of cellulose and are usually found in prokaryotes, protists, and fungus.

a)

cell wall

b)

cell membrane

c)

ribosomes

d)

rough er

54.

Protects, maintains shape, prevents excessive uptake of water

a)

cell wall

b)

cell membrane

c)

vacuole

d)

lysosomes

55.

Is a lipid bilayer, contains a matrix (mixture) of materials, and gives shape and protection

a)

cell membrane

b)

lysosomes

c)

ribosomes

d)

nucleus

56.

This is a perforation (opening) in the cell wall that connects cells by channels. it is filled with cytoplasm and unifies most of the plant into one living continuum.

a)
Plasmodesmata
b)
Vacuoles
c)
Cell membranes
d)

tight junctions

57.

Forms continuous seal around the cell to prevent leakage and makes our skin cells watertight

a)

tight junctions

b)

plasmodesmata

c)

desomosomes

d)

gap junctions

58.

Function like rivets, make cells into strong sheets.

a)

desomosomes

b)

plasmodesmata

c)

gap junctions

d)

tight junctions

59.

attach muscle cells to each other in a muscle cell and when you tear a muscle, you rupture these

a)

desmosomes

b)

tight junctions

c)

plasmodesmata

d)

gap junctions

60.

Found ONLY IN ANIMAL CELLS, function by connecting cells to adjacent cells by providing cytoplasmic channels; found in heart muscle and animal embryos

a)

gap junctions

b)

desomsomes

c)

tight junctions

d)

plasmodesmata

61.

Having a nucleus indicates that you are

a)
a prokaryote
b)
a bacterium
c)
a virus
d)
a eukaryote
62.

What does it mean to have membrane bound organelles?

a)
Cells lack any specialized structures entirely.
b)
All organelles are free-floating within the cytoplasm.
c)
Having membrane-bound organelles means that a cell contains specialized structures enclosed by membranes, allowing for compartmentalization of cellular functions.
d)
Membrane-bound organelles are only found in bacteria.
63.

What are the three parts of the cell theory?

a)

All cells contain DNA and RNA. All cells have a nucleus. All cells have ribosomes

b)

All cells are identical in structure and function. All cells have a nucleus. All cells are round.

c)
1) All living organisms are composed of one or more cells. 2) The cell is the basic unit of life. 3) All cells arise from pre-existing cells.
d)
Cells can spontaneously generate from non-living matter.
64.

All cells have what in common with each other?

a)

ribosomes

b)

cell wall

c)

celll membrane

d)

cytoplasm

e)

nucleus/nucleoid region

65.

What two organelles were thought to have been bacteria at one point because of the fact they have their own DNA?

a)
Endoplasmic reticulum and vacuoles
b)
Golgi apparatus and lysosomes
c)
Mitochondria and chloroplasts
d)
Nucleus and ribosomes