What is the smallest, basic unit of life responsible for all life processes?

Cell

True or False: Robert Hooke was the first biologist to discover cells in 1665.

True

Fill in the blank: Cells range in size from 0.0001 mm to nearly _____ mm across.

150

Which scientist observed cells with movement and concluded they were alive?
A) Robert Hooke
B) Anton Van Leeuwenhoek
C) Robert Brown
D) Rudolf Virchow

B) Anton Van Leeuwenhoek

What are the smallest known cells called?

Mycoplasmas

True or False: All prokaryotic cells have a true nucleus surrounded by a membrane.

False. Prokaryotic cells have no nucleus; genetic material is in the nucleoid region.

Fill in the blank: The size of eukaryotic cells ranges between _____ µm in diameter.

10-100

Which organelle is called the powerhouse of the cell?
A) Ribosome
B) Lysosome
C) Mitochondrion
D) Golgi body

C) Mitochondrion

What is the jelly-like substance inside the cell membrane where organelles are suspended?

Cytoplasm

True or False: The cell wall is present in both plant and animal cells.

False. The cell wall is present exclusively in plant cells.

Fill in the blank: Chloroplasts contain the pigment called _____ for photosynthesis.

Chlorophyll

Why are lysosomes known as suicide bags of the cell?

They engulf foreign bodies and help in cell renewal by destroying harmful substances.

Which organelle is responsible for protein synthesis in cells?
A) Endoplasmic reticulum
B) Golgi bodies
C) Ribosomes
D) Vacuoles

C) Ribosomes

What three components make up the plant cell wall?

Cellulose, hemicellulose, and pectin

True or False: Prokaryotes reproduce only through binary fission.

False. They mainly reproduce by binary fission but also use conjugation.

Fill in the blank: Each human cell contains _____ pairs of chromosomes.

23

Which process allows cells to multiply and facilitate organism growth?
A) Meiosis
B) Mitosis
C) Photosynthesis
D) Respiration

B) Mitosis

What is the function of the nuclear membrane in cells?

It protects the nucleus by forming a boundary between nucleus and other organelles.

Riddle: I am called the cell's post office because I transport materials. What am I?

Golgi bodies

True or False: Energy flows within cells according to modern cell theory.

True

Fill in the blank: The _____ is the site of ribosome synthesis in the nucleus.

Nucleolus

What happens during passive transport across cell membranes compared to active transport?

Passive transport requires no energy and follows concentration gradients; active transport requires energy.