BIOLOGY
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
DNA polymerase
DNA ligase
Helicase
None of these
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Explanation
The enzyme responsible for joining Okazaki fragments during DNA replication is DNA ligase .
Okazaki fragments:
These are short, newly synthesized DNA fragments that are formed on the lagging strand during DNA replication.
Lagging Strand Synthesis:
The lagging strand is synthesized discontinuously, meaning it's made in fragments.
Role of DNA ligase:
DNA ligase catalyzes the formation of a phosphodiester bond, effectively joining the sugar-phosphate backbones of adjacent Okazaki fragments, creating a continuous, double-stranded DNA molecule.
A set of Proteins
A set of all proteins in the cell
Protein in Specific Region of the cell
None of these
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Explanation
The term "proteome" refers to the entire set of proteins produced or modified by an organism or system , which can vary based on time, stress, and distinct requirements.
پیشاب ____ میں پیدا ہوتا ہے؟
Kidney
Pancreas
Spleen
Gallbladder
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Explanation
The kidneys are part of the urinary tract that makes urine (pee) .
Urine has s alts, toxins, and water that need to be filtered out of the blood.
After the kidneys make urine , it leaves the body using the rest of the urinary tract as a pathway.
مندرجہ ذیل میں سے کون سا جسم میں بیماری اور انفیکشن کے خلاف مزاحمت کے طور پر کام کرتا ہے؟
Red Corpuscle
Vitamins
White Corpuscles
Carbohydrates
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Explanation
White Corpuscles , or White Blood Cells (WBCs), or Leukocytes , act as a defense mechanism by fighting infections and diseases in the body.
They play a key role in the immune system.
They help fight infections and protect the body against foreign substances, such as bacteria, viruses , and other pathogens.
خوراک کا کون سا جز قبض کو روکنے میں مدد کرتا ہے؟
Carbohydrates
Fiber
Fats
Proteins
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Explanation
Fiber is a key component in foods that help relieve constipation. It is a major part of stool . It adds bulk to the stool , aiding in smoother digestion. Fiber supports the microbiome , maintaining a healthy balance of bacteria in the digestive tract. High-fiber recipes offer additional digestive benefits beyond constipation relief.
کون سی خوراک میں پروٹین اور آئرن کی سب سے زیادہ مقدار ہوتی ہے؟
Meat
Fruits
Vegetables
None of these
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Explanation
Meat , especially lean options like chicken, beef, and pork , is a rich source of protein . It is also high in iron , essential for blood and energy production.
وٹامن ڈی کی کمی کی وجہ سے کون سی علامت ہے؟
Bones breaking easily
Constipation
Anaemia
None of these
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Explanation
Vitamin D deficiency leads to weak bones .
It increasing the risk of fractures and conditions like rickets (in children) and osteoporosis (in adults).
اس جانور کا نام بتائیں جس کی زندگی سب سے طویل عرصے تک ہے؟
Giraffe
Turtle
Elephant
None of these
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Explanation
Some species of turtles , like the Galápagos tortoise and Aldabra tortoise , can live over 150 years.
The ocean-dwelling Greenland shark holds the record for the longest lifespan among vertebrates, living over 400 years.
مندرجہ ذیل میں سے کون سی بیماری جلد کو متاثر کرتی ہے؟
Rickets
Osteoporosis
Anemia
Pellagra
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Explanation
Pellagra:
Cause: Lack of niaci n (vitamin B3)
Skin symptoms: Inflamed skin, especially in areas exposed to sunlight or friction
Other symptoms : Diarrhea, dementia
انسانی ہڈیوں میں درج ذیل میں سے کون سی چیز نہیں ہوتی؟
Phosphorous
Calcium
Carbon
Oxygen
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Explanation
Human bones do not contain Oxygen as a primary component
Human bones are primarily composed of calcium phosphate (Ca₃(PO₄)₂), which contains calcium (Ca) and phosphorus (P).
Bones also contain carbon (C) as they have organic components like collagen.
However, bones do not contain elementa l oxygen as a distinct component,
Though oxygen is present in bone compounds (e.g., phosphates and carbonates).
