Biology · 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 physics current electricity and magnetism electric cells and batteries

While making a battery ___________  of a cell is connected to ________ of other cell.

  1. negative terminal , negative terminal

  2. positive terminal , negative terminal

  3. positive terminal , positive terminal

  4. neutral terminal ,negative terminal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

While making a battery, negative end of battery is connected to positive terminal of other cell and so on.


Answer-(B)

Multiple choice plant kingdom biology

Smallest unit in the plant cell wall is

  1. Micelle

  2. Microfibril

  3. Fibril

  4. None of these.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In plant cell wall structure, the micelle is considered the smallest unit, consisting of a bundle of cellulose chains.

Multiple choice

The alveolar membrane is _____ cells thick

  1. 0

  2. 2

  3. 5

  4. 10
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The respiratory membrane, where gas exchange occurs in the lungs, consists of the alveolar epithelium and the capillary endothelium, making it two cells thick.

Multiple choice

The term for brain cell regeneration is...

  1. Never therapy

  2. Cognitive repair

  3. Neurogenesis

  4. Nucleases adaptation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Neurogenesis is the biological process by which new neurons are formed in the brain, occurring primarily in the hippocampus.

Multiple choice

Where does the hair’s mitotic cells grow?

  1. hair root

  2. matrix

  3. hair shaft

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

The hair matrix is the actively dividing area of the hair bulb where mitosis occurs to produce new hair cells. The hair root and shaft are structures formed by these cells.

Multiple choice

Where do you find the germinative cells of the epidermis?

  1. stratum granulosum

  2. stratum lucidum

  3. stratum spinosum

  4. stratum malpigium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The stratum germinativum, also known as the stratum basale or stratum malpighii, is the deepest layer of the epidermis where cell division occurs.

Multiple choice

What happens when cells under go a photo thermal tissue reaction

  1. they are destroyed

  2. they are reshaped

  3. they are softened into a more pliable form

  4. they merge with other cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A photothermal tissue reaction occurs when light energy is absorbed by a chromophore, converted into heat, and causes the destruction of the targeted cells.