जीव विज्ञान – Zoology – Zoology MCQ

जीव विज्ञान – Zoology: प्रश्न र उत्तर

सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।

सही: ० / ०

131. Which of the following cellular structures is primarily responsible for intracellular movement and transport?

     कGolgi apparatus. खEndoplasmic reticulum. गCytoskeleton. घLysosomes.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

132. The term ‘synapse’ refers to the junction between two neurons. What is the primary function of this synapse?

     कRapid electrical conduction across the neuron membrane. खPhysical connection between neurons through microtubules. गTransmission of signals from one neuron to another via chemical messengers. घComplete detachment and reattachment of neuronal branches.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

133. The process of osmosis plays a critical role in maintaining water balance within animal cells. Which of the following best describes this process?

     कMovement of solute from an area of high concentration to low concentration. खMovement of water molecules across a semi-permeable membrane from a region of higher water potential to lower water potential. गActive transport requiring energy expenditure to move substances against their gradient. घDiffusion of gases within the cell, maintaining equilibrium.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

134. The enzyme ptyalin (salivary amylase) acts primarily on which substance?

     कProteins खLipids गCarbohydrates घNucleic acids
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

135. Which of the following is a key characteristic found in all chordates?

     कExolocation खThree-chambered heart गNotochord घScales
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

136. The process of endocytosis is characterized by:

     कMovement of molecules out of the cell. खCell division into two identical daughter cells. गThe engulfment of substances from outside the cell through membrane invagination. घSynthesis of proteins within ribosomes.
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

137. Which of the following cell types is primarily responsible for transporting oxygen in mammalian blood?

     कNeutrophils खBasophils गErythrocytes घLymphocytes
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

138. The contractile sheath surrounding the cardiac muscle fibers is called:

     कSarcomere खMyofibril गSarcoplasmic reticulum घStriation
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

139. The process of apoptosis (programmed cell death) is a tightly regulated event in multicellular organisms. What is the primary signal that triggers this process?

     कIncreased levels of growth hormones खActivation of DNA repair mechanisms गRelease of caspases, a family of proteases घAccumulation of damaged proteins
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

140. Which of the following structures is responsible for maintaining internal homeostasis by regulating water balance in the human kidney?

     कa) Glomerulus खb) Nephron Loop गc) Collecting Duct घd) Bowman's Capsule
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।