UHS MDCAT PAST PAPER 22-09-2024
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
بیکٹیریوفیج کی زندگی کے چکر میں، انفیکشن کے عمل کے مراحل کے بعد کس وقت میں لائزوزائمز کی ضرورت ہوتی ہے؟
Replication
Adsorption
Genome injection
Penetration
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Explanation
Lysozymes are required during the penetration step of the bacteriophage infection process.
They break down the bacterial cell wall.
It allowing the phage to inject its genome into the host cell.
خسرہ کا سبب بننے والا جاندار ______ ہے؟
Picornovirus
Paramyxovirus
Paporivirus
Poxivirus
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Explanation
The causative organism of measles is paramyxovirus .
Specifically, the measles virus belongs to the Paramyxoviridae family.
It is responsible for causing the highly contagious disease characterized by fever and a red rash.
پولی ہیڈرل کیپسڈ والے وائرس کی مثال جو 252 کیپسومیرز کے ساتھ ہے _____ ہے؟
Influenza virus
Bacteriophage
Adenovirus
Tobacco Mosaic Virus
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Explanation
The example of viruses having a polyhedral capsid with 252 capsomeres is adenovirus .
Adenoviruses are known for their icosahedral structure.
It containing exactly 252 protein subunits called capsomeres .
مندرجہ ذیل میں سے ایک فلاجیلا کے حوالے سے درست ہے؟
Originates from basal bodies
They are immotile
Made up of macrofilaments
Contains centriole
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Explanation
The correct statement regarding flagella is that they originate from basal bodies .
Flagella are motile structures anchored in the cell by basal bodies , which help in cell movement .
بیکٹیریل جینوم ڈپلائیڈ _______ ہو جاتا ہے؟
During binary fission
After binary fission
After fertilization of gametes
Before spore formation
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Explanation
The bacterial genome becomes diploid during binary fission .
Before the cell divides, the bacterial DNA replicates, temporarily creating two copies (diploid-like state) until the cell splits into two daughter cells.
پروکریوٹک خلیات ____ کی کمی ہے؟
Storage bodies
Membrane bound organelles
Mesosomes
Ribosomes
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Explanation
Prokaryotic cells lack membrane-bound organelles.
They do not have structures like a nucleus, mitochondria, or endoplasmic reticulum.
They are characteristic of eukaryotic cells.
حیاتیات میں غذائیت کا آٹوٹروفک موڈ ______ پر منحصر ہے؟
Photosynthesis mode
Obligate mode
Saprotrophic mode
Parasitic mode
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Explanation
Autotrophic mode of nutrition in organisms depends upon the photosynthesis mode .
Autotrophs, like plants and some bacteria , use sunlight to produce their own food by converting carbon dioxide and water into glucose and oxygen.
سیوڈموناس بیکٹیریا میں سانس ______ ہے؟
Anaerobic
Facultative
Microaerophili
Aerobic
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Explanation
Respiration in Pseudomonas bacteria is aerobic .
These bacteria primarily use oxygen as the terminal electron acceptor in their respiration process .
Although some species can also perform anaerobic respiration under certain conditions.
انسانوں میں پھیپھڑوں کی عام صلاحیت کی حد ______ ہے؟
10-11 liter
12-13 liter
5-6 liter
8-9 liter
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Explanation
The range of normal total lung capacity in humans is 5-6 liters .
Total lung capacity includes the maximum amount of air the lungs can hold, encompassing tidal volume, inspiratory reserve volume, expiratory reserve volume, and residual volume.
کاربن ڈائی آکسائیڈ کا تقریباً 70 فیصد خون میں _____ کے طور پر جاتا ہے؟
Tricarbonate
Carbonic anhydrase
Carbonate
Bicarbonate
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Explanation
About 70% of carbon dioxide is carried in blood as bicarbonate .
This occurs when carbon dioxide reacts with water , forming carbonic acid , which then dissociates into bicarbonate ions and protons.
It facilitating transport in the bloodstream .