PU PRE-MEDICAL (PU-M) PAST PAPER 15-06-2025
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
وہ عمل جس میں ٹھوس براہ راست گیس میں تبدیل ہوتا ہے _____ کہلاتا ہے؟
- Distillation
- Filtration
- Sublimation
- Crystallization
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Explanation
- Sublimation is the process in which a solid directly changes into a gas without passing through a liquid phase.
- This endothermic phase transition
- Occurs when a substance absorbs enough energy to overcome intermolecular forces.
- Deposition: Gas to Solid (the reverse process).
- Examples: Dry ice, iodine, frost/snow.
Last updated on 06-March-2026
- His hairs are white
- His hair is white
- His hair are white
- His white are hairs.
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
"Hair" is uncountable when referring to all the hair on a person’s head.
We use "is" (singular verb) with "hair" in this context.
- Do away with
- Eradicate
- Nullify
- End
- All of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Abolish means ختم کردینا
Do away with means کے ساتھ دور کرو
Nullify means مسترد کرنا
End means ختم
مندرجہ ذیل میں سے کون سا ٹھوس عمدہ مواد نہیں ہے؟
- Glucose
- Sodium Chloride
- Iodine
- Camphor
- Both A and B
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Explanation
- Sublimation is the transition of a substance from the solid to the gas phase without going through the liquid phase.
- Glucose and Sodium Chloride do not sublime, as they require a liquid phase transition before turning into a gas.
Here are the some solid sublime material:
دو مونوساکرائیڈز کے درمیان بننے والے بانڈ کو کہتے ہیں؟
- Peptide bond
- Glycosidic bond
- Hydrogen bond
- Phosphodiester bond
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Explanation
Monosaccharides are the building blocks of disaccharides (such as sucrose, lactose, and maltose) and polysaccharides (such as cellulose and starch).
A glycosidic bond is a covalent bond that connects two monosaccharides to form a disaccharide or polysaccharide.
Glycosidic bonds (also called glycosidic linkages) can be of the alpha or the beta type.
گیس کا مثالی مساوات کیا ہے؟
- PV=nRT
- 𝑃 𝑉 = 𝑑 𝑅 𝑇
- 𝐷 = 𝑉 𝑀
- Both A and B
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Explanation
PV=nRT is the standard form of the ideal gas law, where:
PV=dRT is a derived form of the ideal gas equation when you use density d instead of moles n (using , where M is molar mass).
تمباکو موزیک وائرس کی شکل _____ ہے؟
- Spiral
- Rod shaped
- Spherical
- None of these
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Explanation
Tobacco mosaic virus (TMV) has a rod-like or cylindrical shape.
It's essentially a rigid, helical structure with a protein shell (capsid) surrounding a single-stranded RNA molecule
The capsid is composed of protein subunits arranged in a helical structure.
کس سائنس دان نے لاک اور کلیدی ماڈل دیا؟
- Louis Pasteur
- Emil Fischer
- Robert Hooke
- Watson and Crick
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Explanation
Emil Fischer proposed the lock and key model in 1894 to explain enzyme-substrate specificity.According to this model, the enzyme's active site fits the substrate exactly like a key fits into a lock.
انزائم کا غیر پروٹین حصہ _____ ہے؟
- Co-enzyme
- Co-factor
- Holoenzyme
- Prosthetic Group
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Explanation
The non-protein part of an enzyme is called a cofactor.
Coenzyme: A type of cofactor that is loosely bound to the enzyme and can be easily removed.
Prosthetic group: A type of cofactor that is tightly bound to the enzyme.
Holoenzyme: The complete enzyme, consisting of the protein part (apoenzyme) and the non-protein part (cofactor).
- Ectoderm
- Mesoderm
- Endoderm
- Periderm
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Explanation
The digestive system in animals develops primarily from the endoderm, with contributions from the mesoderm for certain structures.
The ectoderm plays a role in the development of the mouth and anus.
