General Biology

Play an AI-generated podcast conversation about this lesson

What does the cell theory state about all living organisms?

All living organisms are unicellular.
All living organisms arise from spontaneous generation.
All living organisms are composed of one or more cells. (correct)
All living organisms are capable of spontaneous generation.

Which scientist is known for stating that all cells arise from pre-existing cells?

Theodor Schwann
Robert Hooke
Rudolf Virchow (correct)
Antonie Philips van Leeuwenhoek

What does the term 'abiogenesis' refer to?

The idea that diseases are caused by microorganisms.
The belief that life arises spontaneously from non-living matter. (correct)
The generation of life from living matter.
The study of cell division.

What is the smallest fundamental unit of life according to cell theory?

Cell (D) Signup and view all the answers

Which of these correctly defines a tissue?

A collection of similar cells carrying out related functions. (A) Signup and view all the answers

According to the cell theory, what is stated about unicellular and multicellular organisms?

Both unicellular and multicellular organisms are composed of cells. (A) Signup and view all the answers

What misconception did people have regarding spontaneous generation?

Living organisms can arise from non-living matter. (C) Signup and view all the answers

What role do organ systems play in an organism?

They perform a singular function in coordination. (B) Signup and view all the answers

What is the primary function of glucagon in the body?

Increases blood sugar levels (B) Signup and view all the answers

Which of the following is NOT one of the main jobs of cells?

Make waste (A) Signup and view all the answers

What is the role of the cell membrane?

Controls the movement of materials in and out (C) Signup and view all the answers

Which statement accurately describes phospholipids?

They consist of two fatty acid chains and a phosphate group. (D) Signup and view all the answers

What characterizes the division of labor in cells?

Each type of cell has specialized functions. (A) Signup and view all the answers

What substance do aquaporins specifically transport across the cell membrane?

Water molecules (B) Signup and view all the answers

What can be inferred about the relationship between cells and energy?

All cell functions require energy. (D) Signup and view all the answers

In what way do plants and animal cells differ concerning the cell wall?

Plant cells have a cell wall made of carbohydrates. (B) Signup and view all the answers

What role does the cell wall primarily serve in plant cells?

Support and protection (C) Signup and view all the answers

Which of the following organisms have a cell wall made of cellulose?

Plants (A) Signup and view all the answers

Which organelle is primarily responsible for the production of ATP?

Mitochondria (B) Signup and view all the answers

What is the term for programmed cell death?

Apoptosis (B) Signup and view all the answers

What are plasmids commonly associated with in bacteria?

Antibiotic resistance (D) Signup and view all the answers

What is the main function of flagella in certain cells?

Locomotion (D) Signup and view all the answers

Which statement about chloroplasts is false?

They are found in animal cells. (D) Signup and view all the answers

What distinguishes prokaryotic cells from eukaryotic cells?

Presence of a nucleus (C) Signup and view all the answers

What is the role of phospholipids in prokaryotic cells?

They attach cells to surfaces and provide protection. (A) Signup and view all the answers

Which part of the cell membrane is described as hydrophilic?

The polar head of the phospholipid. (D) Signup and view all the answers

What does the term 'selective permeable membrane' refer to?

A membrane that selectively chooses which molecules can enter the cell. (D) Signup and view all the answers

What functions are associated with the cytoplasm?

It provides a jelly-like medium for organelles. (B) Signup and view all the answers

Which characteristic differentiates non-polar molecules from polar molecules?

Non-polar molecules may not allow water to enter. (A) Signup and view all the answers

What is the primary function of the nucleus in a cell?

To serve as a storehouse of genetic information. (D) Signup and view all the answers

How does protein synthesis occur within the cell?

By using mRNA to convert DNA into amino acid chains. (B) Signup and view all the answers

Which structure is responsible for the rigid support of the cell?

Cell wall (B) Signup and view all the answers

What is the primary function of ribosomes in the cell?

Protein synthesis (A) Signup and view all the answers

Which type of RNA is responsible for carrying genetic information from DNA to ribosomes?

mRNA (D) Signup and view all the answers

What is a key function of the smooth endoplasmic reticulum (SER)?

Lipid synthesis (D) Signup and view all the answers

What is the role of the Golgi apparatus in the cell?

Sorting and packaging of proteins (D) Signup and view all the answers

Which cellular process involves white blood cells engulfing bacteria?

Phagocytosis (B) Signup and view all the answers

What structure acts as a storage sac within the cell?

Vacuole (B) Signup and view all the answers

What is the main purpose of peroxisomes within a cell?

Detoxification of toxic substances (D) Signup and view all the answers

Which sequence best describes the path taken by proteins as they are synthesized and processed?

Nucleus → Ribosomes → ER → Golgi Apparatus → Vesicles (C) Signup and view all the answers

What is the basis of the cell theory?

All living organisms are made up of one or more cells.

Who stated that all cells arise from pre-existing cells?

Rudolf Virchow