Tag: zoology

Questions Related to zoology

Which of the following is an oligopotent stem cell?

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. Lymphoid cells

  2. Satellite cell

  3. Hemopoietic cell

  4. Both A and C

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Correct Option: D

Cord blood is the sample of blood taken from the

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. Placenta.

  2. Umbilical cord.

  3. Urethra.

  4. None of the above.

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Correct Option: B
Explanation:

Stem cells are found in all organisms and are capable of dividing to form new cells which can be differentiated into various types of specialised cells. The umbilical cord is the structure which attaches the fetus with the placenta in the maternal womb. The cord blood is the sample of blood which is collected from the umbilical cord. The umbilical cord contains the embryonic stem cells which can use for the treatment of disorders during the life of an individual and so, they are preserved. 

Thus, the correct answer is option B.  

Which of the following has reported success in re-growing cochlea hair cells with the use of embryonic stem cells?

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. James E. Till

  2. Heller

  3. Eva Engvall

  4. None of the above

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Correct Option: B
Explanation:

The technique in which the stem cells are transplanted from donor into the patient for production of the new cells is known as the stem cell therapy. Heller was the scientist who performed experiments on the hair cells in the cochlea. The damaged hair cells were transplanted with the embryonic stem cells. The damaged cells showed growth and differentiated to form the hair cells. 

Thus, the correct answer is option B. 

In syngeneic stem cell transplant, the stem cells are obtained by

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. From the individual itself.

  2. From a donor.

  3. From the identical twin.

  4. None of the above.

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Correct Option: C
Explanation:

There are different types of transplantations in which the donor from which the stem cells are received differs. In the case of the syngeneic stem cell transplantation, the stem cells are obtained from the identical twin. There are very fewer chances of graft versus host reaction and rejection in these type of transplantation.

Thus, the correct answer is option C. 

Which of the following is considered as a complication of stem cell transplantation?

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. Graft-versus-host disease

  2. Down syndrome

  3. Huntington's disease

  4. None of the above

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Correct Option: A
Explanation:

The stem cell transplantation is the method which can be used for the treatment of many disorders like cancer, genetic defects, etc. The main complication of this method is graft rejection by the host. The graft may contain antigens which act as a foreign body in the host. The antibodies are produced against this organ which results in the rejection and destruction of the organ in the host. 

Thus, the correct answer is option A. 

Cellular totipotency was for the first time demonstrated by

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. F. C. Steward

  2. P. Maheshwari

  3. W. H. Muir

  4. Y. P. S. Bajaj

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Correct Option: A
Explanation:

Totipotency was first demonstrated by Steward and Reinert in the 1950s. Professor F. C. Steward discovered and laid the foundation for plant tissue culture; genetic engineering and plant biotechnology of food crops or trees.

White matter of spinal cord contains

zoology neural control and coordination structure and function of spinal cord the spinal cord spinal cord

  1. Nerve axons

  2. Cell bodies

  3. Clusters of neurons and cell bodies

  4. Motor neurons

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Correct Option: A
Explanation:

White matter is a component of the central nervous system, in the brain and spinal cord, and consists mostly of glial cells and myelinated axons that transmit signals from one region of the cerebrum to another and between the cerebrum and lower brain centers.

All are true about spinal cord except:

zoology neural control and coordination structure and function of spinal cord the spinal cord spinal cord

  1. Epidural space around meninges is present.

  2. Pseudounipolar neurons found in ventral root.

  3. Sensory fibre in dorsal root and motor fibre in ventral root.

  4. Lateral horn cell realted cell to ANS formation.

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Correct Option: A
Explanation:
The soma (cell body) of each Pseudounipolar neuron is located within a dorsal root ganglion.
Pseudounipolar neurons are also found in the sensory ganglia of cranial nerves V, VII, IX and X, all mixed-cranial nerves.
 So, the correct option is  'Pseudounipolar neurons found in the ventral root'.

State whether the following statement is true or false.

Spinal cord heal itself after an injury.

zoology neural control and coordination structure and function of spinal cord the spinal cord spinal cord

  1. True

  2. False

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Correct Option: B
Explanation:

As a matter of fact, the central nervous system is one of the best-protected systems in the entire body, defended by the bones of the skull and spinal column. Unfortunately, when these bones are injured or fractured they can compromise the soft tissue in the spinal cord, causing permanent damage. If you strain a muscle, it repairs itself. But the spinal cord is different. That's because some of the cells in the central nervous system are so complex and specialized that they don't have the ability to regenerate. 

So, the correct answer is 'False'.

Lining of brain ventricle and central canal of spinal cord is called as

zoology neural control and coordination structure and function of spinal cord the spinal cord spinal cord

  1. Ependyma

  2. Endothelium

  3. Mesothelium

  4. Neurosensory

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Correct Option: A
Explanation:
The ciliated cells that line fluid-filled cavities of ventricles of the brain and central canal of the spinal cord are called as ependyma. The endothelium is the inner most layer of arteries and veins. Mesothelium is the epithelial layer of the thoracic and abdominal cavity. The afferent nerves serve the neurosensory function. 
So, the correct answer is option A.