Biology Basics: Cells, Tissues, Organs, and Organ Systems

Questions and Answers

Prokaryotic cells lack a nucleus and membrane-bound organelles. (correct)

Prokaryotic cells have bigger ribosomes than eukaryotic cells.

Prokaryotic cells are always multicellular organisms.

Prokaryotic cells can only survive in extreme environments.

To store genetic information.

To provide structural support.

To control cell division.

To synthesize proteins. (correct)

To facilitate photosynthesis.

To regulate the movement of substances.

To provide strength and support. (correct)

To store nutrients.

Chloroplasts Signup and view all the answers

The amount of light reaching the specimen. Signup and view all the answers

Energy production through respiration Signup and view all the answers

An organ system is a group of organs that collaborate for a specific function. Signup and view all the answers

Water and dissolved nutrients Signup and view all the answers

To provide storage and strength. Signup and view all the answers

Scanning Electron Microscope Signup and view all the answers

Study Notes

A cell represents the simplest unit of life, exhibiting all living characteristics.
Tissue is defined as a group of similar cells working together to perform a specific function.
An organ consists of various tissues collaborating to execute a particular function.
An organ system comprises multiple organs coordinating their functions for a common purpose.

A transmission electron microscope reveals the internal structure of cells with high detail.
A scanning electron microscope provides a detailed surface view of specimens.
The diaphragm in a microscope regulates the amount of light illuminating the specimen.
The fine focus knob is utilized for precise focusing of the microscope image.

Organelles are specialized cell components with specific roles in cell function.
Plant cells possess unique organelles not found in animal cells, including cell walls, chloroplasts, and vacuoles.
The cell wall provides structural strength and support to the cell.
Vacuoles primarily serve to maintain cell strength and storage of substances.
Chloroplasts are responsible for producing chlorophyll, essential for photosynthesis.
Ribosomes are the cellular machinery for protein synthesis.
The nucleus governs cell activities and houses genetic information.
Cytoplasm serves as the environment for cellular reactions.
Mitochondria are the sites of cellular respiration, generating energy for the cell.

The cell membrane retains cellular contents and is essential for cellular integrity.
It recognizes molecules that come into contact with the cell.
The membrane controls the entry and exit of substances in and out of the cell.
It provides structural support for the cell.