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 biology immunity monoclonal antibodies antibody production and vaccination biotechnology

The hybridoma cells are 

  1. Cells of oncogenes and brain

  2. Hybrid activated B lymphocytes fused with myeloma cells

  3. Hybrid cells of oncogenes fused with myeloma cells

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

A hybridoma cell is produced in the laboratory from the fusion of an antibody-producing lymphocyte and a nonantibody-producing cancer cell, usually a myeloma or lymphoma. It proliferates and produces a continuous supply of a specific monoclonal antibody.

Therefore, the correct answer is option B.

Multiple choice zoology nervous system neural tissue structure of neuron nervous tissues
Which of the following cells do not form layer and remain structurally separate?

  1. Epithelial cells

  2. Muscle cells

  3. Nerve cells

  4. Gland cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Nerve cells or neurons are the cells specialised to conduct an electrochemical current. Nerve tissue is made up of these cells. Only nerve cells do not form layers and remain structurally separate.
So the correct option is, 'Nerve cells'.
Multiple choice zoology nervous system neural tissue structure of neuron nervous tissues

Which of the following conducts messages?

  1. Epithelial cells

  2. Cardiac cells

  3. Nerve cells

  4. Skeletal cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Human body contains millions of nerve cells that transmit such messages or impulses. Nerve cells are made up of dendrites, cell body and axon. The dendrites are branching fibres that receive the signals from the axon terminal of the other neuron and pass is to cell body. Cell body then pass the message further to axon.
So, the correct answer is 'Nerve cells'.
Multiple choice zoology nervous system neural tissue structure of neuron nervous tissues

Centrosomes are absent in ______________.

  1. Nerve cells

  2. Epithelial cells

  3. Germinal cells

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

Mature nerve cells (neurons) are specialized cells that have lost the ability to divide, and they lack centrosomes, which are required for cell division.

Multiple choice zoology nervous system neural tissue structure of neuron nervous tissues

Which of the following is not considered to be a tissue?

  1. cartilage

  2. Blood

  3. Lung

  4. Cardiac muscle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cartilage is supportive non-living soft connective tissue

Blood is fluid connective tissue
Cardiac muscle is a tissue made of cardiac cells
So, the correct option is 'Lung', which is an organ made of multiple tissue

Multiple choice tissues of animals tissues: plant and animal tissues animal tissues structure of living organisms biology animal tissues and its type tissues: animal tissues fluid connective tissue cell division in embryo development division for growth and reproduction

Mast cells occur in ______________.

  1. Areolar tissue

  2. Adipose tissue

  3. White fibrous tissue

  4. Yellow fibrous tissue
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mast cells are immune cells that release histamine and heparin; they are commonly found in connective tissues, specifically areolar tissue.

Multiple choice tissues of animals tissues: plant and animal tissues animal tissues structure of living organisms biology animal tissues and its type tissues: animal tissues fluid connective tissue cell division in embryo development division for growth and reproduction

Different types of cells are given below.

[Hepatocytes, WBC's, Basophils, Fibroblasts, Plasma cells, Mast cells, Osteocytes, Chondrobiasts.]

Identify the cells that are found embedded in the matrix of areolar tissue and select the correct option.

  1. Fibrobiasts, Hepatocytes, Mast cells, Osteocytes

  2. WBC's, Basophils, fibrobiasts, Mast cells, Plasma cells

  3. Fibrobiasts, WBC's , Plasma cells, Mast cells

  4. Fibrobiasts, WBC's, Chondrobiasts, Mast cells
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Areolar tissues are widely distributed connective tissue in the animal body. It is named because so because it takes the form of fine threads crossing each other in every direction leaving small spaces called areolae. 
  • The areolar tissue consists of ground substance, the matrix, white yellow and reticular fibers and cells like fibroblasts, hepatocytes, mast cells and osteocytes.

So the correct answer is 'Fibroblasts, hepatocytes, mast cells, osteocytes'.
Multiple choice tissues of animals tissues: plant and animal tissues animal tissues structure of living organisms biology cell division in embryo development division for growth and reproduction

Our outer layer of skin is an example of which type of tissue?

  1. Muscular

  2. Epithelial

  3. Connective

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

Our outer layer of skin is made up of epithelial tissues. The epidermis is composed of the outermost layers of cells in the skin.

Multiple choice tissues of animals tissues: plant and animal tissues animal tissues structure of living organisms biology cell division in embryo development division for growth and reproduction
The cell junctions namely tight, adhering and gap junctions are found in ______________.

  1. connective tissues

  2. epithelial tissues

  3. neutral tissues

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

Cell junctions are proteins that connect the cytoplasmic content of adjacent cells, they form a barrier between two cells and also hold or adhere cell together or with the extracellular matrix. these are abundant in epithelial tissue.

So, the correct answer is 'epithelial tissues'

Multiple choice physics chemical effects of electric current study about cells electric cell types of cells

 What are the three basic parts of a cell?

  1. Electrodes, electrolyte, container

  2. Electrodes, acid, water

  3. Anode, cathode, ions

  4. Anode, load, depolarize
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A cell is basically a source of energy or electrical energy; there are three basic things required to make a cell work.

$i)$ The source of energy,(electrolyte)
$ii)$ The conduction medium to transfer energy (electrodes)
$iii)$ The contained to stare the energy. 

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

Cancer is a disease where body cells grow unchecked. A protein found in the body interferes with the growth of cancer cells. It is used for the treatment of cancer. Identify it.

  1. Haemoglobin

  2. Casein

  3. Keratin

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

Casein is a slow-digesting dairy protein that people often take as a supplement. It releases amino acids slowly, so people often take it before bed to help with recovery and reduce muscle breakdown while they sleep. Several studies have shown it helps boost muscle growth, along with a ton of other benefits.

Also Casein interferes with the growth of cancer cells and hence is also used for the treatment of cancer.
Hence option B is correct answer.

Multiple choice spectrophotometer, colorimeter and biosensor biochemical techniques bio-chemistry

Cells obtained from an organism were homogenised and centrifuged. A test indicated that the cells contained glycogen. If you are asked to find out as quickly as possible whether the cells were from a plant or an animal, you would

  1. Examine the centrifuge for presence of extracts of centrioles

  2. Answer immediately that the cells were from an animal source

  3. Examine the centrifuge for the presence of extracts of chloroplasts

  4. Answer immediately that the cells were from a plant source.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glycogen is the primary storage polysaccharide in animals, whereas plants store energy primarily as starch. Finding glycogen is a strong indicator of an animal cell source.

Multiple choice spectrophotometer, colorimeter and biosensor biochemical techniques bio-chemistry

Pure fractions of cellular components can be isolated by

  1. Chromatography

  2. Scanning electron microscopy

  3. X-ray diffraction

  4. Differential centrifugation

  5. Autoradiography
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Differential centrifugation is the primary laboratory technique used to isolate pure fractions of cellular components by exploiting differences in sedimentation rates.