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Which hormone delays leaf senescence?
কোন হরমোন পাতার বার্ধক্য (Senescence) বিলম্বিত করে?
Practice MCQ for SSC, UPSC, RRB Exams
A. Cytokinin
A. সাইটোকাইনিন
B. Auxin
B. অক্সিন
C. Ethylene
C. ইথিলিন
D. Abscisic acid
D. অ্যাবসিসিক অ্যাসিড
Correct Answer: A
সঠিক উত্তর: A
Explanation
ব্যাখ্যা
Correct Answer: A) Cytokinin
Cytokinins
are plant hormones that play a key role in
delaying leaf senescence
.
They help maintain
chlorophyll content
in leaves, preventing yellowing.
Cytokinins promote
cell division
and sustain
protein synthesis
in plant tissues.
By delaying senescence, cytokinins help leaves remain
physiologically active for longer periods
.
Ethylene
and
abscisic acid
promote senescence and stress responses, while
auxin
mainly regulates cell elongation.
সঠিক উত্তর: A) সাইটোকাইনিন
সাইটোকাইনিন
হলো উদ্ভিদ হরমোন যা
পাতার বার্ধক্য বিলম্বিত করতে
সাহায্য করে।
এটি পাতার মধ্যে
ক্লোরোফিলের পরিমাণ বজায় রাখে
, ফলে পাতা হলুদ হওয়া রোধ হয়।
সাইটোকাইনিন
কোষ বিভাজন
ও
প্রোটিন সংশ্লেষণ
বজায় রাখতে সাহায্য করে।
এর ফলে পাতা দীর্ঘ সময় ধরে
সক্রিয় ও কার্যক্ষম
থাকে।
ইথিলিন
ও
অ্যাবসিসিক অ্যাসিড
বার্ধক্য ও চাপজনিত প্রতিক্রিয়া বাড়ায়, আর
অক্সিন
মূলত কোষ বৃদ্ধিতে কাজ করে।
Related Questions
সম্পর্কিত প্রশ্ন
Coconut milk contains a cytokinin called ____ which promotes plant growth.
Which of the following is a natural plant hormone?
The function of plant hormone 'Gibberellins' is:
The hormone responsible for fruit ripening is:
Which plant hormone is known as the ‘stress hormone’?
Which of the following plant hormones causes apical dominance?
Which hormone promotes cell division in plant roots and shoots?
Which hormone promotes seed dormancy?
Bolting in plants is promoted by:
Which hormone is used to induce parthenocarpy in tomatoes?
The only gaseous plant hormone is:
Which hormone promotes lateral root formation?
Which hormone is synthesized in root tips?
Which plant hormone is involved in stomatal closure during drought?
The plant hormone involved in flowering in pineapple is:
Which of the following is a synthetic auxin?
Seedless grapes are developed using:
Which of the following is a naturally occurring cytokinin?
Dwarfism in plants is due to the deficiency of:
Which hormone is transported basipetally (from apex to base) in plants?
Which plant hormone regulates phototropism?
Plant hormone promoting root hair formation:
The plant hormone used in tissue culture to promote shoot growth:
Gibberellin was discovered from:
Cytokinin was first isolated from:
Tropic movements in plants are regulated by:
Wound healing in plants is promoted by:
Which of the following is a synthetic cytokinin?
Which of the following is not a function of cytokinins?
Parthenocarpic fruits are developed using which hormone?
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