Read the assertion and reason carefully and choose the correct option.
Q2.
Assertion (A): Lysosomes are considered polymorphic organelles.
Reason (R): Lysosomes exhibit morphological variations like primary lysosomes, secondary lysosomes, and residual bodies depending on their functional state.
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is not the correct explanation of A
A) A рдФрд░ R рджреЛрдиреЛрдВ рд╕рддреНрдп рд╣реИрдВ рдФрд░ R, A рдХрд╛ рд╕рд╣реА рд╕реНрдкрд╖реНрдЯреАрдХрд░рдг рд╣реИ
B) A рдФрд░ R рджреЛрдиреЛрдВ рд╕рддреНрдп рд╣реИрдВ рд▓реЗрдХрд┐рди R, A рдХрд╛ рд╕рд╣реА рд╕реНрдкрд╖реНрдЯреАрдХрд░рдг рдирд╣реАрдВ рд╣реИ
C) A рд╕рддреНрдп рд╣реИ рд▓реЗрдХрд┐рди R рдЕрд╕рддреНрдп рд╣реИ
D) A рдЕрд╕рддреНрдп рд╣реИ рд▓реЗрдХрд┐рди R рд╕рддреНрдп рд╣реИ
Answer: (A)
Lysosomes are called polymorphic because they exist in different forms (primary, secondary, autophagic vacuoles, residual bodies) during various stages of intracellular digestion.
Match the structural component of the nucleus (List I) with its specific function (List II).
Q3. List I: P. Nucleolus Q. Nuclear lamina R. Nuclear pore complex. List II: 1. Mechanical support to the nucleus 2. Ribosome synthesis 3. Regulation of nucleocytoplasmic transport.
The nucleolus is the site of rRNA synthesis and ribosome assembly. The nuclear lamina provides structural support. The nuclear pore complex regulates the exchange of materials.
The statement is false. Heterochromatin is the highly condensed, transcriptionally inactive region. Euchromatin is loosely packed and transcriptionally active.
Q5. In the context of cell signaling, which of the following secondary messengers is generated by the cleavage of phosphatidylinositol 4,5-bisphosphate (PIP2) by Phospholipase C?
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