Biology ยท Science General

Cell Biology and Structure

3,062 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

Battery is a

  1. Combination of two or more cells

  2. Combination of cell and conductor

  3. Combination of two cells

  4. Large single cell
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Battery is a combination of two or more cells arranged in series.

Multiple choice

Organelles that are surrounded by two membranes are

  1. Nucleus and mitochondria

  2. Nucleus and golgi bodies

  3. Endoplasmic reticulum and lysosomes

  4. Endoplasmic reticulum and mitochondria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Golgi body, lysosomes and endoplasmic reticulum are single membrane bound organelles.

Multiple choice

Which of the following statements is not correct?

  1. In plant cells, vacuoles are absent

  2. Vacuole is bound by single membrane

  3. In Ameoba, contractile vacuole is important for excretion

  4. Flagellum is important for locomotion by bacteria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In plant cells vacuoles are present. All other statements are correct.

Multiple choice

Which of the following statements is correct about plasma membrane?

  1. It allows all cells to pass into and out of cells

  2. It prevents all substances from passing into and out of cell

  3. It is composed of mainly a protein bilayer

  4. It is composed mainly of a lipid bilayer
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plasma membrane is selectively permeable and is made up of lipids.

Multiple choice

Nucleus is concerned with

  1. Entry and exit of materials

  2. Transmission of genetic character

  3. production of energy

  4. Secretion of enzymes and proteins
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Entry and exit of materials-cell membrane, production of energy-mitochondria, secretion of enzymes and proteins- Golgi apparatus

Multiple choice

Which of the following statements is incorrect?

  1. Prokaryotic cells are surrounded by cell membrane

  2. Prokaryotic cells have well defined nucleus

  3. Eukaryotic cells have genetic information

  4. Eukaryotic cells have membrane bound organelles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The nucleus in prokaryotes is not surrounded by a nuclear membrane.