Question

QUESTION 42 Protein A is a viral protein of 100 amino acids. Protein B is a viral protein of 500 amino acids. Which of the following is true concerning these two proteins? Protein B has more epitopes than protein A Protein A has less chance to be recognized by the host antibodies Protein B can activate more B cell clones than protein A during clonal selection All of the above

Answer 1

QUESTION 41-

ANSWER - true statement -T₄ is an amine harmone.

All other statement are wrong .

statement - neurons do not secret harmones.

Explanation -

• this is wrong statement.
• Neurons secret harmones.
• Endocrine system interacts and cooperates with nervous system to regulate the activities of the organ system of the body.
• Neuron in the hypothalamus secrete releasing harmones and inhibitory harmones into blood capillaries at the base of the hypothalamus.
• Releasing harmones and inhibitory harmones are released by neurosecretory cell of hypothalamus.

Statement - harmones secretion can be voluntary or involuntary.

Explanation - this is wrong statement.

Statement- catecholamines are cholesterol based harmones.

Explanation - this is wrong statement. Catecholamines are amino acid derivative harmones.

Statement- T₄ is an amine harmone.

Explanation-

• this is correct statement.
• T₄ is also called as thyroxine or tetraiodothyronine.
• It is amino acid derivative harmones.
• Derived from modification of an amino acid tyrosine.
• It is lipid soluble.
• 
  Thyroxine derived from modification of tyrokine Camino acid) H Ho C - C- OH (Tyrokine) H NH₂ Z T4 I 4 I المسما H (Tayroxine xine) -C- Ho он احسه I H NH,
  

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