वनस्पति विज्ञान – Botany – Botany MCQ

वनस्पति विज्ञान – Botany: प्रश्न र उत्तर

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

सही: ० / ०

41. The process of osmosis involves the movement of water across a semi-permeable membrane. Which of the following best describes this movement?

    कA) Movement of solute molecules from an area of high concentration to low concentration. खB) Movement of water molecules from an area of high water potential to low water potential. गC) Movement of molecules driven by active transport mechanisms. घD) Movement of ions across the membrane requiring energy input.
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

42. Leucoplasts responsible for storing oils and fats are known as:

    कChloroplasts खChromatophores गGlycoplats घElaioplasts
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

43. Which of the following micronutrients is essential for the synthesis of auxin in plant cells?

    कNitrogen खMagnesium गIron घManganese
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

44. The term 'alternation of generations' describes a life cycle in plants characterized by:

    कA) A constant, continuous growth phase without reproductive stages. खB) The cyclical switching between a haploid (n) gametophyte stage and a diploid (2n) sporophyte stage. गC) The simultaneous presence of both male and female flowers on the same plant. घD) Dependence solely on external sources for nourishment throughout its life cycle.
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

45. Consider a plant with variegated leaves – exhibiting both green and white patches. This pattern is primarily due to the uneven distribution of which pigment?

    कA) Chlorophyll - the primary photosynthetic pigment. खB) Carotenoids - responsible for orange, yellow, and red colors. गC) Anthocyanins - pigments contributing to purple and blue hues. घD) Phycobilins – pigments involved in light harvesting in algae.
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

46. The presence of chloroplasts within cells indicates that these cells are likely involved in:

    कA) Absorption of water through osmosis. खB) Synthesis of proteins for cellular repair. गC) Photosynthesis, converting light energy into chemical energy. घD) Transporting nutrients throughout the plant.
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

47. What is the primary role of anthocyanins, pigments responsible for the red, purple, and blue colors in many flowers and fruits?

    कProtection against UV radiation खRegulation of plant growth गAttraction of pollinators and seed dispersers घIncreased photosynthetic efficiency
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

48. Consider a mature potato tuber. Which tissue type predominantly contributes to its storage capacity?

    कParenchyma खCollenchyma गSclerenchyma घEpidermis
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

49. Which of the following cellular organelles is primarily responsible for synthesizing secondary metabolites, including alkaloids and tannins?

    कMitochondria खRibosomes गPlastids (specifically chloroplasts and chromoplasts) घGolgi Apparatus
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।

50. The phenomenon of ‘sink’ in plants refers to:

    कA region where photosynthesis occurs at a high rate. खA location in the plant that actively absorbs nutrients and sugars from elsewhere in the plant. गA barrier preventing water movement across cell membranes. घA process of gaseous exchange between the roots and the atmosphere.
    💬 टिप्पणी / गल्ती रिपोर्ट (०)

    छलफल / प्रश्न उत्तरमा गल्ती छ

    पठाउनुहोस्

    टिप्पणी जाँचपछि मात्र देखिन्छ।