Which characteristic defines a prokaryotic cell?

Lack of a nucleus and other membrane-bound organelles

Presence of a membrane-bound nucleus

Containment of chloroplasts only

Ability to form organs and organ systems

Which phrase best describes a eukaryotic cell?

A complex cell with a membrane-bound nucleus and other membrane-bound organelles

A simple cell without internal membranes

A cell that cannot carry out life’s processes

A cell that exists only as a single organism

Which statement aligns with the idea that all living things are made of cells?

Both unicellular amoebas and multicellular dogs are cellular life forms.

Nonliving objects are also made of cells.

Only animals are made of cells, not plants.

A student claims an organism is multicellular but lacks tissues and organs. Based on the section, how should this claim be evaluated?

It is partially supported: multicellular organisms are made of many cells and may organize into tissues and organs, but organization can vary.

It is fully supported because multicellular organisms never organize into tissues or organs.

It is false: multicellular organisms must be single-celled.

It is irrelevant to cell theory.

Which statement correctly describes cell walls according to the comparison chart?

Only fungi and plants have cell walls, made of chitin or cellulose

All cells have cell walls made of peptidoglycan

Only animals have cell walls made of cellulose

Which group consists entirely of organisms with eukaryotic cells?

Animals, plants, fungi, protists

All cells share which set of features?

Cell membrane, ribosomes, cytoplasm, genetic material

Nucleus, mitochondria, chloroplasts

Cell wall, vacuole, chloroplasts

Golgi apparatus, lysosomes, centrosomes

Consider the note that eukaryotes can be uni- or multicellular. Which inference is best supported?

Some eukaryotes exist as single cells while others form multicellular organisms

All unicellular organisms are prokaryotes

Only plants are multicellular eukaryotes

Prokaryotes are always multicellular

Which statement best defines organelles in eukaryotic cells?

Specialized structures within the cell that work together to help the cell function

Membrane-bound structures outside the cell that protect it

Random clusters of proteins that form only during cell division

Any structure that contains DNA, regardless of location

According to the introduction, why are organelles compared to “mini organs” in a cell?

They work together for a main purpose, such as making proteins

They are visible without a microscope

Each performs identical tasks to keep the cell alive

They are found only in animal cells

Which distinction is emphasized between prokaryotic and eukaryotic cells in this section?

Only eukaryotic cells have membrane-bound organelles

Prokaryotes are multicellular, eukaryotes are unicellular

Eukaryotes lack any internal structures

Which statement best describes the location of the cell (plasma) membrane?

It surrounds the outside of all cells

It lies only inside the nucleus

It is found only in prokaryotes

What is the basic structural arrangement of the cell membrane?

A double layer known as the phospholipid bilayer

A triple layer of carbohydrates

What is the primary job of the cell membrane?

Controlling what goes in and out of the cell

Which statement correctly pairs polarity with water interaction in the membrane?

Both tails and heads like water

What does the term phospholipid bilayer specifically indicate about membrane composition?

Two layers of fats called phospholipids

Alternating layers of cellulose and protein

Carbohydrates in the membrane are mainly embedded for which purpose?

Structural support and recognition

Why is the cell membrane described by the Fluid Mosaic Model?

It is composed of many parts that move around freely

It is made only of carbohydrates

A small water-soluble molecule needs to cross the membrane. Based on the model, which route is most plausible?

Through a channel protein embedded in the bilayer

Directly through hydrophobic tails without assistance

By passing only through carbohydrate chains

Which combination best matches membrane regions with their chemical nature?

Heads: hydrophobic; Tails: hydrophilic

Which statement integrates structure and function of the membrane most accurately?

A flexible phospholipid bilayer with embedded proteins controls selective transport

A rigid bilayer prevents any molecular movement

Carbohydrates form channels that pump ions

Cholesterol stores genetic information for transport

Which statement best describes the structure of the cytoskeleton?

Network of threadlike fibers made of proteins

Jelly-like substance mainly water

Besides shaping the cell, which additional function is attributed to the cytoskeleton?

Producing ATP directly from sunlight

Regulating membrane transport channels

What best describes the cytoplasm’s structure?

Jelly-like substance mainly made of water

Which is the main job of the cytoplasm?

Exports waste through the membrane

A student claims the cytoskeleton is usually easy to see in simple cell diagrams. Based on the material, how should you respond?

Disagree; it is usually not pictured in a cell diagram

Agree; it is typically bold and labeled

Agree; it is shown as a thick outer layer

Disagree; it is always shown as the nucleus

Which pairing correctly matches component to function?

Cytoskeleton—moves organelles; Cytoplasm—holds everything in place

Cytoplasm—provides cell shape; Cytoskeleton—holds organelles

Cytoskeleton—photosynthesis; Cytoplasm—protein packaging

Cytoplasm—stores genetic material; Cytoskeleton—cell wall formation

What is the primary job of the nucleus in a eukaryotic cell?

Protect the DNA that controls the cell’s activities

The nuclear envelope is best described as:

A double membrane with pores regulating transport

A single solid barrier with no openings

A carbohydrate coat that stores energy

Where is the nucleolus located within the cell?

Embedded in the plasma membrane

Which statement best distinguishes the nucleolus from the nucleus?

The nucleolus makes rRNA while the nucleus houses and protects DNA

The nucleolus contains DNA while the nucleus makes rRNA

Both structures synthesize proteins directly

The nucleus floats freely in the cytoplasm while the nucleolus is membrane-bound

LS U2 Cell Theory

Authored by Sally Wheeler

Science

10th Grade

120 Questions

NGSS covered

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement is one of the three main tenets of cell theory?

All cells contain chloroplasts.

All living things are made of cells.

Cells are visible without microscopes.

Only animals have cells.

Tags

NGSS.MS-LS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to cell theory, what is the basic unit of life?

Organs

Organ systems

Cells

Tissues

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cell theory states that new cells originate from which source?

Chemical reactions in air

Minerals in soil

Proteins in food

Other cells

Tags

NGSS.MS-LS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which description best matches a unicellular organism?

Composed of many cells organized into tissues and organs

Composed of one cell

Composed only of organ systems

Composed of several tissues but no organs

Tags

NGSS.MS-LS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Multicellular organisms are defined as:

Made of a single cell with many nuclei

Composed of many cells that may organize into tissues, organs, and organ systems

Lacking any cellular organization

Made only of tissues but not organs

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement explains why cells are called the most basic unit of life?

They are the largest structures in organisms.

They are the smallest part of an organism still capable of all of life’s processes.

They contain the most DNA in the body.

They always function only as groups.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cells are very diverse. Which conclusion follows from this statement?

All cells have identical structures and functions.

Cells can vary in structure while still performing life processes.

Only animal cells are diverse.

Diversity prevents cells from performing life processes.

Tags

NGSS.MS-LS1-3

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LS U2 Cell Theory

Which statement is one of the three main tenets of cell theory?

According to cell theory, what is the basic unit of life?

Cell theory states that new cells originate from which source?

Which description best matches a unicellular organism?

Multicellular organisms are defined as:

Which statement explains why cells are called the most basic unit of life?

Cells are very diverse. Which conclusion follows from this statement?

What are the two broad types of cells introduced in this section?

Which characteristic defines a prokaryotic cell?

Which phrase best describes a eukaryotic cell?

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