General
In stomach, pepsinogen is converted to?
A) Enzyme
B) Pepsin
C) Proteins
D) Amylase
Author:
Wasim Abbas
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Pepsinogen is an inactive precursor, or zymogen, secreted by the gastric glands in the stomach lining. It is converted into its active form, pepsin, in the presence of hydrochloric acid (HCl). This acidic environment triggers the activation process.
Pepsin is a proteolytic enzyme that begins the digestion of proteins by breaking them down into smaller peptides. This process is essential for further digestion and absorption in the small intestine.
The conversion of pepsinogen into pepsin is a protective mechanism. If pepsin were active inside the cells that produce it, it could digest the stomach lining itself. By secreting it in an inactive form, the body prevents self-damage.
Other options are incorrect: “enzyme” is too general, proteins are the substrate, and amylase digests carbohydrates.
Thus, pepsin is the correct answer. This concept is important for understanding enzyme activation and digestive physiology, commonly tested in exams.
General
The simple data structure is?
A)
Array
B)
Graph
C)
Tree
D)
Network
A simple data structure refers to a basic and linear way of organizing data in memory. Among the given options, an array is considered the simplest data structure. It stores elements of the same type in contiguous memory locations, allowing direct access using an index. This makes arrays efficient for accessing and storing data when the size is known in advance.
Arrays are widely used in programming because of their simplicity and speed. They allow constant time access (O(1)) to elements, which is a major advantage over more complex structures. However, arrays have limitations such as fixed size and difficulty in insertion or deletion operations.
Graphs, trees, and networks are non-linear and more complex data structures. They are used for advanced applications like hierarchical data representation and relationships.
Thus, array is the correct answer because it represents the most basic and fundamental data structure in computer science.
General
Taj Mahal constructed by?
A)
Babur
B)
Aurangzeb
C)
Shah Jahan
D)
Jehangir
The Taj Mahal was constructed by Mughal Emperor Shah Jahan in memory of his wife Mumtaz Mahal. Built in Agra, India, it is one of the most famous monuments in the world and a UNESCO World Heritage Site.
Construction began in 1632 and took over 20 years to complete. The monument is known for its white marble architecture and intricate design.
Thus, Shah Jahan is the correct answer.
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General
International day for desertification and drought observed on?
A)
17th January
B)
17th May
C)
17th June
D)
17th July
This UN day is observed on 17 June to raise awareness about desertification and drought issues worldwide.
General
Parthenocarpy results in?
A)
Sweet smelling fruits
B)
Seedless fruit
C)
Summer fruits
D)
Small fruits
Parthenocarpy is the development of fruit without fertilization, resulting in seedless fruits. This phenomenon can occur naturally or be induced artificially using plant hormones.
Common examples include bananas and seedless grapes. These fruits are commercially valuable because they are easier to eat and often preferred by consumers.
In normal fruit development, fertilization triggers seed formation. In parthenocarpy, this step is bypassed, but fruit growth still occurs.
Other options are incorrect because parthenocarpy specifically refers to seedless fruit production.
Thus, seedless fruit is the correct answer. This concept is important in botany and agriculture, especially in improving crop quality and market value.
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General
‘Villi’ is found in?
A)
Large intestine
B)
Small intestine
C)
Stomach
D)
Liver
Villi are small, finger-like projections found in the inner lining of the small intestine. Their main function is to increase the surface area for absorption of nutrients.
Each villus contains blood vessels and lymphatic vessels (lacteals) that help absorb digested nutrients such as glucose, amino acids, and fatty acids. This adaptation makes nutrient absorption highly efficient.
The large intestine mainly absorbs water and salts and does not have villi. The stomach is involved in digestion but not absorption at this level. The liver processes nutrients but does not contain villi.
Thus, the small intestine is the correct answer. This concept highlights the importance of structural adaptations in biological systems to enhance function.
Understanding villi is crucial in topics like digestion, absorption, and diseases such as celiac disease, where villi are damaged.
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