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Arsh Tiwari 5 years, 3 months ago
Posted by Mukul Kumar 😎 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
The cytoplasmic chromosome of eucaryotes are 80 S. They occur inside the cytoplasm of eukaryotes either freely or attached to ER. The ribosomes are large in size with a length of (300-340 Angstrom) and breadth (200-240 Angstrom). The two subunits of 80S ribosomes are 60S and 40S. A tunnel occurs between the two subunits for passage of mRNA. The large subunit has a groove for pushing out the newly synthesized polypeptide. 80S ribosomes are synthesized inside the nucleolus. 80S ribosomes do not become functional inside the nucleous. Their subunits come out of the nucleus and become operational in cytoplasm. 40S subunit of 80S ribosome contains 33 protein molecules and a single 18S rRNA. 60S subunit has 40 protein molecules and three types of rRNAs- 28S, 5.8S and 5S.
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Arsh Tiwari 5 years, 3 months ago
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Mukul Kumar 😎 5 years, 3 months ago
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Arsh Tiwari 5 years, 3 months ago
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Arsh Tiwari 5 years, 3 months ago
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Suhani Rai 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Monoatomic:- The elements that have only one atom in molecule are called monoatomic elements. They are stable. Example:- Ne,Ar all are Noble gases.
Palak Pandey 5 years, 3 months ago
Posted by Palak Pandey 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
Momentum = Mass X Velocity
p = mv
Unit of momentum is given as:
| SI unit | kg.m.s-1 |
Arsh Tiwari 5 years, 3 months ago
Posted by Akriti Singh 5 years, 3 months ago
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Arsh Tiwari 5 years, 3 months ago
Arsh Tiwari 5 years, 3 months ago
Palak Pandey 5 years, 3 months ago
Palak Pandey 5 years, 3 months ago
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Arsh Tiwari 5 years, 3 months ago
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Posted by Saniya Sagar 5 years, 3 months ago
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Gaurav Seth 5 years, 3 months ago
a n s w e r
The electrons revolve around the nucleus in fixed circular paths called energy levels or shells.The energy levels or shells are represented in two ways:
a) K,L,M,N…….
b) 1,2,3,4,5……
Posted by Anu T.S 5 years, 3 months ago
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Gaurav Seth 5 years, 3 months ago
Epithelial Tissue
The covering or protective tissues in the animal body are epithelial tissues. Epithelium covers most organs and cavities within the body. It also forms a barrier to keep different body systems separate. The skin, the lining of the mouth, the lining of blood vessels, lung alveoli and kidney tubules are all made of epithelial tissue. Epithelial tissue cells are tightly packed and form a continuous sheet. They have only a small amount of cementing material between them and almost no intercellular spaces. Obviously, anything entering or leaving the body must cross at least one layer of epithelium. As a result, the permeability of the cells of various epithelia play an important role in regulating the exchange of materials between the body and the external environment and also between different parts of the body. Regardless of the type, all epithelium is usually separated from the underlying tissue by an extracellular fibrous basement membrane.
Different epithelia show differing structures that correlate with their unique functions. For example, in cells lining blood vessels or lung alveoli, where transportation of substances occurs through a selectively permeable surface, there is a simple flat kind of epithelium. This is called the simple squamous epithelium. Simple squamous epithelial cells are extremely thin and flat and form a delicate lining. The oesophagus and the lining of the mouth are also covered with squamous epithelium. The skin, which protects the body, is also made of squamous epithelium. Skin epithelial cells are arranged in many layers to prevent wear and tear. Since they are arranged in a pattern of layers, the epithelium is called stratified squamous epithelium.
Where absorption and secretion occur, as in the inner lining of the intestine, tall epithelial cells are present. This columnar (meaning �pillar-like�) epithelium facilitates movement across the epithelial barrier. In the respiratory tract, the columnar epithelial tissue also has cilia, which are hair-like projections on the outer surfaces of epithelial cells. These cilia can move, and their movement pushes the mucus forward to clear it. This type of epithelium is thus ciliated columnar epithelium.
Cuboidal epithelium (with cube-shaped cells) forms the lining of kidney tubules and ducts of salivary glands, where it provides mechanical support. Epithelial cells often acquire additional specialisation as gland cells, which can secrete substances at the epithelial surface. Sometimes a portion of the epithelial tissue folds inward, and a multicellular gland is formed. This is glandular epithelium.
Posted by Palak Pandey 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
| Vitamin B6 (Water-soluble) | Scientific name : Pyridoxine | Food Sources: Pork, chicken, fish, bread, wholegrain cereals, eggs, vegetables, soya beans, etc. |
Мυѕкαи ? 5 years, 3 months ago
Posted by Utkarsh Dhiman 5 years, 3 months ago
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Gaurav Seth 5 years, 3 months ago
| Particulars | Heat | Temperature |
| Definition | The heat of an object is the total energy of all the molecular motion inside that object. | Temperature is the measure of the thermal energy or average heat of the molecules in a substance. |
| SI Unit | Joule | Kelvin |
| Unit | Joules, Calories | Fahrenheit, Celsius, Kelvin |
| Symbol | Q | T |
| Particles | It’s a measure of the number of atoms multiplied by the energy possessed by each atom. | It is like a level which determines the direction in which the heat will flow. It is related to how fast the molecule within a substance are moving. |
| Ability to do Work | It is has the ability to do work | It can be used to measure the degree of heat. |
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Yogita Ingle 5 years, 3 months ago
We know that,
1 km = 1000 m
1 hour =3600
Now converting km/h into m/s, we get
90 km/h = 90 km/h x 5/18 = 25m/s.
Posted by Devansh Sodha 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
We know that,
1 km = 1000 m
1 hour =3600
Now converting km/h into m/s, we get
90 km/h = 90 km/h x 5/18 = 25m/s.
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Suhani Rai 5 years, 3 months ago
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