Biology ยท Science General

Cell Biology and Structure

3,221 Questions

Cell biology focuses on the structure and function of cellular organelles. Key topics include cellular respiration, DNA inheritance, and energy production. These fundamental biology concepts are crucial for medical entrance and state service examinations.

Cell organelles functionsCellular respiration sitesDNA and ribosomesAnimal cell structurePlant cell components

Cell Biology and Structure Questions

Multiple choice

How are proteins made?

  1. They are synthesized in the ribosomes.

  2. They are synthesized in the nucleus.

  3. They are synthesized in the mitochondria.

  4. They are synthesized in the Golgi apparatus.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Proteins are synthesized in the ribosomes. The ribosomes read the genetic code in messenger RNA (mRNA) and assemble amino acids into a protein chain.

Multiple choice

What is the name of the organelle that is responsible for producing energy in cells?

  1. Mitochondrion

  2. Chloroplast

  3. Endoplasmic reticulum

  4. Golgi apparatus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mitochondria are the organelles that are responsible for producing energy in cells.

Multiple choice

What is the name of the organelle that is responsible for photosynthesis in plants?

  1. Mitochondrion

  2. Chloroplast

  3. Endoplasmic reticulum

  4. Golgi apparatus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chloroplasts are the organelles that are responsible for photosynthesis in plants.

Multiple choice

What is the term for the process of removing a tissue sample from the body for examination?

  1. Biopsy

  2. Autopsy

  3. Excision

  4. Debridement
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biopsy involves the removal of a small tissue sample from the body for microscopic examination to aid in the diagnosis of diseases.

Multiple choice

What is a nucleus?

  1. A membrane-bound organelle that contains the cell's DNA

  2. A membrane-bound organelle that contains the cell's RNA

  3. A membrane-bound organelle that contains the cell's proteins

  4. A membrane-bound organelle that contains the cell's lipids
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A nucleus is a membrane-bound organelle that contains the cell's DNA.

Multiple choice

What is a cell?

  1. The basic unit of life

  2. A small structure that is made up of molecules

  3. A large structure that is made up of cells

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A cell is the basic unit of life.

Multiple choice

Which of the following is responsible for the synthesis of proteins in a cell?

  1. Nucleus

  2. Mitochondria

  3. Ribosomes

  4. Golgi apparatus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ribosomes are cellular structures responsible for protein synthesis, where mRNA is translated into a sequence of amino acids to form a protein.

Multiple choice

What is the primary function of the Golgi apparatus in a cell?

  1. Energy production

  2. Protein synthesis

  3. Lipid metabolism

  4. Packaging and secretion of molecules
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for secretion from the cell.

Multiple choice

Which organelle is responsible for cellular respiration and energy production?

  1. Nucleus

  2. Mitochondria

  3. Endoplasmic reticulum

  4. Lysosomes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mitochondria are the primary site of cellular respiration, where glucose and other nutrients are broken down to produce energy in the form of ATP.

Multiple choice

Which cellular structure is responsible for the synthesis and modification of lipids?

  1. Nucleolus

  2. Endoplasmic reticulum

  3. Golgi apparatus

  4. Mitochondria
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The endoplasmic reticulum, particularly the smooth endoplasmic reticulum, is involved in the synthesis and modification of lipids, including phospholipids and steroids.

Multiple choice

Which cellular structure is responsible for the synthesis of ribosomes?

  1. Nucleus

  2. Mitochondria

  3. Endoplasmic reticulum

  4. Golgi apparatus
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

The nucleolus is a specialized region within the nucleus that is responsible for the synthesis and assembly of ribosomes, the cellular structures that carry out protein synthesis.

Multiple choice

Which cellular structure is responsible for the synthesis and secretion of hormones?

  1. Nucleus

  2. Mitochondria

  3. Endoplasmic reticulum

  4. Golgi apparatus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The endoplasmic reticulum, particularly the rough endoplasmic reticulum, is involved in the synthesis and secretion of proteins, including hormones, which are then modified and packaged in the Golgi apparatus.

Multiple choice

Which cellular structure is responsible for the synthesis of DNA?

  1. Nucleus

  2. Mitochondria

  3. Endoplasmic reticulum

  4. Golgi apparatus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

DNA synthesis, also known as DNA replication, occurs in the nucleus of the cell, where the genetic material is located.

Multiple choice

Which cellular structure is responsible for the synthesis of carbohydrates?

  1. Nucleus

  2. Mitochondria

  3. Endoplasmic reticulum

  4. Golgi apparatus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The endoplasmic reticulum, particularly the smooth endoplasmic reticulum, is involved in the synthesis of carbohydrates, including the formation of glucose and other sugars.

Multiple choice

Which cellular structure is responsible for the synthesis of amino acids?

  1. Nucleus

  2. Mitochondria

  3. Endoplasmic reticulum

  4. Golgi apparatus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Amino acid synthesis, also known as protein synthesis, occurs in the cytoplasm of the cell, where ribosomes translate mRNA into a sequence of amino acids to form a protein.