SST BIOLOGY, CHEMISTRY PAPER 10-01-2021
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
کرپس مشن کی تجاویز کے بارے میں ہندوستانی نیشنل کانگریس اور آل انڈیا مسلم لیگ کا رد عمل _____ تھا؟
- Congress accepted while Muslim League rejected
- Muslim accepted while Congress rejected
- Both Rejected
- Both Accepted
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The Muslim League rejected the proposals because it had given the greatest importance and priority to the creation of one Indian Union.
The Indian National leaders reject the Cripps Mission by the demand for immediate independence.
The Cripps Mission was a failed attempt in late March 1942.
The Cripps Mission was sent by the British government to India.
To obtain Indian cooperation for the British war efforts in the 2nd World War.
The mission was headed by a senior minister Sir Stafford Cripps.
The objective of Cripps Mission: To reform the constitutional issues
- 4
- 3
- 2
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Group IIA elements (alkaline earth metals) have 2 electrons in their outermost s-orbital.
Their general electronic configuration ends with ns², where n is the period number.
جب درجہ حرارت زیادہ سے زیادہ درجہ حرارت سے بڑھ جاتا ہے تو ، _____ کی وجہ سے رد عمل کی شرح تیزی سے کم ہوجاتی ہے؟
- Substrate depletion
- Enzyme denaturation
- Enzyme inhabitation
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
At temperatures above the optimum, enzymes lose their three-dimensional shape — a process called denaturation.
Denatured enzymes cannot bind substrates properly, leading to a rapid drop in reaction rate.
سسٹول کے دوران ، دونوں وینٹریکلز خون کو ______ اور _____ میں پمپ کرنے کا معاہدہ کرتے ہیں؟
- Pulmonary arteries - cardiac veins
- Aorta - pulmonary arteries
- Pulmonary arteries - aorta
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
During systole, the right ventricle pumps blood into the pulmonary arteries (to the lungs).
The left ventricle pumps blood into the aorta (to the rest of the body).
دماغ کو کرینیم کے اندر ممبروں کی تین پرتوں کا احاطہ کیا جاتا ہے جسے _____ کہا جاتا ہے؟
- Dermis
- Meningitis
- Meninges
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Meninges are the three protective membranes (dura mater, arachnoid mater, and pia mater) that surround the brain and spinal cord.
They help protect the central nervous system and contain cerebrospinal fluid (CSF).
وائس باکس کو _____ بھی کہا جاتا ہے؟
- Larynx
- Pharynx
- Windpipe
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The larynx is commonly known as the voice box because it houses the vocal cords.
It is responsible for producing sound.
It is located in the throat.
ربوفلاوین ______ کی ایک مثال ہے؟
- Vitamin B12
- Vitamin B1
- Vitamin B2
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Vitamin B is found in:
- Vegetables (like leafy greens, bell peppers, and mushrooms)
- Whole wheat grains (like brown rice, quinoa, and whole-wheat bread)
- Fresh meat (like beef, chicken, and fish)
Vitamin B is a complex of several B vitamins, including:
- B1 (Thiamin)
- B2 (Riboflavin)
- B3 (Niacin)
- B5 (Pantothenic acid)
- B6 (Pyridoxine)
- B7 (Biotin)
- B9 (Folic acid)
- B12 (Cobalamin)
مچھلیوں میں گلوں کے ذریعہ سانس کو ______ کہا جاتا ہے؟
- Pulmonary respiration
- External respiration
- Bronchial respiration
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Bronchial respiration refers to respiration through gills, mainly seen in fishes.
Gills extract dissolved oxygen from water and expel carbon dioxide.
گیسٹرک رس میں کس تناسب میں پانی دستیاب ہے؟
- 80%
- 70%
- 90%
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Gastric juice is composed of approximately 90% water, which helps dissolve food and enzymes.
The remaining 10% includes hydrochloric acid, enzymes like pepsin, and mucus.
کالا آذر بخار ______ کی وجہ سے ہے؟
- Aedes aegypti
- Plasmodium vivax
- Leishmania donovani
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Kala azar (also known as visceral leishmaniasis) is caused by the protozoan parasite Leishmania donovani.
It is transmitted to humans by the bite of infected female sandflies.