Biology Chapter: Cell Structure and Function

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Who was the first scientist to observe cells under a microscope?

Antonie van Leeuwenhoek
Louis Pasteur
Charles Darwin
Robert Hooke (correct)

An Amoeba is a multicellular organism.

False (B)

What shapes can cells have within an organism?

Cells can have various shapes like polygonal or round.

Cells are classified as unicellular or __________ organisms.

multicellular Signup and view all the answers

Match the following types of organisms with their characteristics:

Unicellular = Consists of a single cell Multicellular = Consists of multiple cells Examples of Unicellular = Amoeba, Euglena Examples of Multicellular = Earthworm, Humans Signup and view all the answers

Which of the following organisms is unicellular?

Amoeba (D) Signup and view all the answers

The smallest cell, known as mycoplasma, is larger than a red blood cell.

False (B) Signup and view all the answers

What is the primary function of a nerve cell?

To transmit nerve impulses. Signup and view all the answers

Which organelle is known as the 'powerhouse of the cell'?

Mitochondria (D) Signup and view all the answers

The largest cell is the ______, which is nearly 170 mm in diameter.

ostrich egg Signup and view all the answers

Match the following cell types with their descriptions:

Liver cell = Stores nutrients and detoxifies the body Fat cell = Stores energy in the form of fat Smooth muscle cell = Responsible for involuntary movements Red blood cell = Carries oxygen throughout the body Signup and view all the answers

The cytoplasm is located between the nuclear membrane and the cell membrane.

True (A) Signup and view all the answers

What structure surrounds all living cells and regulates the entry and exit of substances?

Cell membrane Signup and view all the answers

The organelles responsible for photosynthesis in plant cells are called ______.

chloroplasts Signup and view all the answers

Match the following cell organelles with their functions:

Plastids = Photosynthesis and food storage Golgi Complex = Processes and packages proteins Rough ER = Protein synthesis Smooth ER = Lipid synthesis and detoxification Signup and view all the answers

What is the primary function of mitochondria in a cell?

Generating energy (C) Signup and view all the answers

Chloroplasts are responsible for storing starch in plant cells.

False (B) Signup and view all the answers

What is the control center of the cell that contains genetic material?

Nucleus Signup and view all the answers

The green plastids responsible for photosynthesis are called ______.

chloroplasts Signup and view all the answers

What structure provides a definite shape to plant cells?

Cell Wall (B) Signup and view all the answers

Animal cells possess plastids.

False (B) Signup and view all the answers

What are large vacuoles primarily responsible for in plant cells?

Storage of nutrients and waste products Signup and view all the answers

Animal cells contain a flexible __________ that allows for a variety of shapes.

cell membrane Signup and view all the answers

What is the correct order of levels of organization in multicellular organisms?

Cell, Tissue, Organ, Organ System (D) Signup and view all the answers

Plant cells have a flexible cell wall.

False (B) Signup and view all the answers

What is the primary function of ribosomes?

Protein synthesis Signup and view all the answers

In unicellular organisms like Amoeba, the single cell is responsible for functions such as capturing food, respiration, and __________.

reproduction Signup and view all the answers

Match the following structures with their primary characteristics:

Vacuole = Stores water and waste products Cilia = Tiny extensions for locomotion Flagella = Single tail-like structure for movement Cell Wall = Rigid structure providing support in plants Signup and view all the answers

Unicellular organisms

Organisms made up of a single cell.

Multicellular organisms

Organisms composed of many cells working together.