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Biology: Cells, The Basic Units of Life

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Questions and Answers

What is the smallest unit of life?

Molecules

Organisms

Cells (correct)

Tissues

What is the term for single cell organisms?

Prokaryotes

单细胞生物体 (correct)

Eukarya

Single cell organisms

What is the name of the theory that states that all living organisms are composed of cells?

Cell theory (correct)

Molecular theory

Organism theory

Cellular theory

What is the term for cells that evolved from a common ancestor?

Modern cells Signup and view all the answers

What is the implication of studying cell biology?

It is the same as studying life Signup and view all the answers

What is the scale of life that can only be seen by light microscopy?

Plants and animals cell size: 10-100 µm Signup and view all the answers

What happens to the surface area to volume ratio as the radius of a cell increases?

It decreases Signup and view all the answers

Why are cells typically small in size?

To increase their surface area-to-volume ratio Signup and view all the answers

Who is known as the 'father of microbiology'?

Antonie van Leeuwenhoek Signup and view all the answers

What is the main function of the cell membrane?

To regulate the flow of solutes in and out of the cell Signup and view all the answers

Why are cells often chemically treated and stained with dyes?

To observe internal structures Signup and view all the answers

What is a characteristic of prokaryotic cells?

They do not have a nucleus Signup and view all the answers

What is the resolution of Antonie van Leeuwenhoek's microscope?

0.2 µm Signup and view all the answers

What is the term for the ability of cells to maintain a constant internal environment?

Homeostasis Signup and view all the answers

What is the study of microscopic organisms?

Microbiology Signup and view all the answers

What is the benefit of understanding the microbial world?

To benefit humankind and planet Earth Signup and view all the answers

What is the composition of the cell membrane?

Phospholipid bilayer and embedded proteins Signup and view all the answers