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Ask QuestionPosted by Anil Kumare Pandey 4 years, 5 months ago
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Meghna Thapar 4 years, 5 months ago
Pepsin is the chief digestive enzyme in the stomach that breaks down proteins. We see that chief cells produce pepsinogen (an inactive form of pepsin). Pepsinogen is converted to pepsin when the parietal cells found within the gastric glands secrete hydrochloric acid. Pepsin is a nonspecific protease which is only active at acid pH, and is irreversibly denatured at neutral or alkaline pH as it moves from the stomach into the duodenum. It is therefore essential to make up the pepsin solution from powder in an acidic buffer.
Posted by Sikandar Aman 4 years, 5 months ago
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Yogita Ingle 4 years, 5 months ago
Homeostasis is quite crucial for the survival of organisms. It is often seen as a resistance to changes in the external environment. Furthermore, homeostasis is a self-regulating process that regulates internal variables necessary to sustain life.
In other words, homeostasis is a mechanism that maintains a stable internal environment despite the changes present in the external environment.
Posted by Ayush Gupta 4 years, 5 months ago
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Yogita Ingle 4 years, 5 months ago
The cell wall is made of silica. Due to the siliceous nature of the cell wall, it is known as diatomaceous earth. This diatomaceous earth is a whitish, soft, chemically inert, highly absorbant and fire proof substance. It is used in filtration of oils, sugars, and for other industrial purposes.
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Meghna Thapar 4 years, 5 months ago
Organisms acquire mutations throughout their lives. These mutations are changes to their genetic code, or DNA. DNA is the molecule that contains an organism's genetic information and codes for specific physical characteristics. However, on occasion, a mutation occurs that is beneficial to an organism. These variations often alter gene activity or protein function, which can introduce different traits in an organism. If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation (a process known as natural selection).
Posted by Sandeep Kumar 4 years, 5 months ago
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Yogita Ingle 4 years, 5 months ago
| Types | Systolic blood pressure | Diastolic blood pressure |
| Definition | The amount of pressure exerts on the arteries and blood vessels. | The pressure which is exerted on the walls of the arteries. |
| Normal Range | In infants -95mmHg. In adults- 90-120 mmHg. Age 6 – 9 –100 mmHg. | In infants–65 mm Hg. In adults– 60-80 mmHg. Age 6 – 9 — 65 mmHg. |
| Ventricles of the Heart | Left ventricles contract | Fill with blood |
| Reading of Blood Pressure | The higher number is systolic pressure. | The lower number is the diastolic pressure. |
| Blood pressure inside the arteries | Maximum | Minimum. |
| Blood vessels | Contracts | Relaxed |
| Associated with the age | Increases with the individual’s age | Decreases with the individual’s age |
| Occurs | Systolic stage occurs when the left ventricle gets contracted. | Diastolic stage occurs when the left ventricle gets relaxed. |
Posted by Mansi Mishra 4 years, 5 months ago
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Posted by Palak Bawri 4 years, 5 months ago
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Yogita Ingle 4 years, 5 months ago
Viriods are the sub-virals which is the smallest agent of infectious disease.
While Virus infects the plants and animals, viriod affects the plants only.
Common Cold Virus, Influenza virus etc are some of the example of virus. Potato Spindle tuber Viroid is an example of Viroid.
The Genome of virus is DNA and RNA but Viroid is consist of RNA only.
Posted by Helena Rose 4 years, 5 months ago
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Yogita Ingle 4 years, 5 months ago
Terrestrial animals are either ureotelic or uricotelic, and not ammonotelic. This is because of the following two main reasons:
(a) Ammonia is highly toxic in nature. Therefore, it needs to be converted into a less toxic form such as urea or uric acid.
(b) Terrestrial animals need to conserve water. Since ammonia is soluble in water, it cannot be eliminated continuously. Hence, it is converted into urea or uric acid. These forms are less toxic and also insoluble in water. This helps terrestrial animals conserve water.
Posted by Ashok Kumar 4 years, 5 months ago
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Yogita Ingle 4 years, 5 months ago
Taxonomical aids are the collections of samples or preserved organisms which help in extensive research for the identification of various taxonomic hierarchy. Classifying organisms into various categories needs a lot of field and laboratory study. This is so important because taxonomic categorization helps in identifying many organisms necessary in various fields like agriculture, industries, bioresources, etc.
The taxonomical Aids are the main source which helps us in studying the relative level of a group of organisms, their taxonomic hierarchy and the taxonomic rank.
Taxonomical Aids are required for:
- Taxonomic studies of various species of plants, animals, and other organisms, which require correct classifications and identification.
- Identification of organisms require laboratory and field studies.
- Museum.
- Herbarium.
- Zoological Parks.
- Botanical Gardens.
Posted by Pruthviraj Pawar 4 years, 5 months ago
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Yogita Ingle 4 years, 6 months ago
The method of biological classification based on similarities in the structure of certain compounds among the organisms being classified is called chemotaxonomy.
Posted by Amit Rout 4 years, 6 months ago
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Meghna Thapar 4 years, 6 months ago
Amino acids are molecules used to build proteins. All amino acids have a central carbon atom surrounded by a hydrogen atom, a carboxyl group (COOH), an amino group (NH2), and an R-group. An amino acid is a carboxylic acid-containing an aliphatic primary amino group in the α position to the carboxyl group and with a characteristic stereochemistry. Proteins are biosynthesized from 20 amino acids in a system involving strict genetic control. Thus, amino acids are the basic unit of proteins. The general linear formula of an amino acid is R-CH(NH2)-COOH. The 20 common amino acids are grouped in classes according to their side chains: Click here for IMGT classes of the 20 common amino acids 'Physicochemical' properties. Twenty Amino acids can be grouped according to the characteristics of the side chains as follows: Aliphatic – alanine, glycine, isoleucine, leucine, proline, valine. Aromatic – phenylalanine, tryptophan, tyrosine. Acidic – aspartic acid, glutamic acid.
Posted by Chandranshu Das 4 years, 6 months ago
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Meghna Thapar 4 years, 5 months ago
An isolated metabolic reaction is the reaction which is carried out in-vitro i.e. outside the cell in a cell-free system. Such reactions are performed in a test tube. Hence, they are living reactions but not living things.
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