JEE NEET MATERIALS

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𝐈𝐓'𝐒 𝐓𝐈𝐌𝐄 𝐓𝐎 𝐒𝐓𝐎𝐏 𝐒𝐂𝐑𝐎𝐋𝐋𝐈𝐍𝐆 𝐁𝐓𝐖𝐍 𝐂𝐇𝐀𝐍𝐍𝐄𝐋𝐒 𝐁𝐂𝐎𝐙 𝐖𝐄 𝐇𝐀𝐕𝐄 𝐆𝐎𝐓 𝐄𝐕𝐄𝐑𝐘𝐓𝐇𝐈𝐍𝐆 𝐘𝐎𝐔 𝐖𝐀𝐍𝐓 𝐇𝐄𝐑𝐄 Open / Comment

2021-07-20 18:38:51 Today's JEE Papers , Morning Batch

@iitneetranker Open / Comment

2021-07-20 14:42:09 Classification of solids as ionic, metallic, molecular, network (covalent) or amorphous.

(i) Tetra phosphdecoxide(P4O10) → Molecular

(ii) Ammonium phosphate(NH4)3PO4 → ionic

(iii) SiC → Network (Covalent)

(iv) I2 → molecular

(v) P4 → Molecular

(vi) Plastic → amorphous

(vii) Graphite → Network (Covalent)

(viii) Brass → metallic

(ix) Rb → metallic

(x) LiBR → ionic

(xi) Si → Network (Covalent)

STAY UNMUTED Open / Comment

2021-07-20 13:12:22 Periodic Table Chemistry Tricks -

Group 1 - Lina Kare Rab Se Fariyad
Elements - Li, Na, K, Rb, Cs, Fr

Group 2 - Beta Mange Cars Saari Baap Roye
Elements - Be, Mg, Ca, Sr, Ba, Ra

Group 13 - Bengan, Aaloo, Gazar In Thella
Elements - B, Al, Ga, In, Tl

Group 14 - Chemistry Sir Gives Sanki Problems.
Elements - C, Si, Ge, Sn, Pb

Group 15 - Nepal Pakistan Australia Sab Bikhari (No offence!!)
Elements - N, P, As, Sb, Bi

Group 16 - Old Style Se Tepo
Elements - O, S, Se, Te, Po

Group 17 - Fir Call kar Bahaar AayI Aunty
Elements - F, Cl, Br, I, At

Group 18 - Heena Neena Aur Kareena Xenath Rangeen
Elements - He, Ne, Ar, Kr, Xe, Rn

D blocks elements -

Esi TV Corporation Mange Fir raha hein, Koi Ni Kuch nahi Janta
Elements - Sc, T, V, Cr, Mn, Fe, Co, Ni, Cu, Zn

🅂🄷🄰🅁🄴 🅆🄸🅃🄷 🅈🄾🅄🅁 🄵🅁🄸🄴🄽🄳🅂 Open / Comment

2021-07-20 13:12:22 Mode of Action of Enzymes

Enzymes

Enzymes (Gk. en = in; zyme = yeast) are proteinaceous substances which are capable of catalysing chemical reactions of biological origins without themselves undergoing any change.
Enzymes are biocatalysts.
An enzyme may be defined as "a protein that enhances the rate of biochemical reactions but does not affect the nature of final product."
Maximum enzymes (70%) in the cell are found in mitochondrion. The study of the composition and function of the enzyme is known as enzymology.


There are two views regarding the mode of enzyme action :

(1) Lock and key hypothesis

(2) Induced fit hypothesis

(1) Lock and key hypothesis : The hypothesis was put forward by Emil Fisher (1894) . According to this hypothesis the enzyme and its substrate have a complementary shape. The specific substrate molecules are bound to a specific site of the enzyme molecule.

(2) Induced fit hypothesis : This hypothesis was proposed by Daniel, E. Koshland (1959).

According to this view, the active sites of an enzyme are not rigid. When the substrate binds to enzyme, it may induce a change in shape of the enzyme molecule in such a way that it is fit for the substrate-enzyme interaction. The change in shape of the enzyme molecules can put strain on the substrate. This stress may help bonds to break, thus promoting the reaction. Open / Comment

2021-07-20 13:12:22 Periodic Table Chemistry Tricks -

Group 1 - Lina Kare Rab Se Fariyad
Elements - Li, Na, K, Rb, Cs, Fr

Group 2 - Beta Mange Cars Saari Baap Roye
Elements - Be, Mg, Ca, Sr, Ba, Ra

Group 13 - Bengan, Aaloo, Gazar In Thella
Elements - B, Al, Ga, In, Tl

Group 14 - Chemistry Sir Gives Sanki Problems.
Elements - C, Si, Ge, Sn, Pb

Group 15 - Nepal Pakistan Australia Sab Bikhari (No offence!!)
Elements - N, P, As, Sb, Bi

Group 16 - Old Style Se Tepo
Elements - O, S, Se, Te, Po

Group 17 - Fir Call kar Bahaar AayI Aunty
Elements - F, Cl, Br, I, At

Group 18 - Heena Neena Aur Kareena Xenath Rangeen
Elements - He, Ne, Ar, Kr, Xe, Rn

D blocks elements -

Esi TV Corporation Mange Fir raha hein, Koi Ni Kuch nahi Janta
Elements - Sc, T, V, Cr, Mn, Fe, Co, Ni, Cu, Zn

🅂🄷🄰🅁🄴 🅆🄸🅃🄷 🅈🄾🅄🅁 🄵🅁🄸🄴🄽🄳🅂 Open / Comment

2021-07-20 13:12:22 Mode of Action of Enzymes

Enzymes

Enzymes (Gk. en = in; zyme = yeast) are proteinaceous substances which are capable of catalysing chemical reactions of biological origins without themselves undergoing any change.
Enzymes are biocatalysts.
An enzyme may be defined as "a protein that enhances the rate of biochemical reactions but does not affect the nature of final product."
Maximum enzymes (70%) in the cell are found in mitochondrion. The study of the composition and function of the enzyme is known as enzymology.


There are two views regarding the mode of enzyme action :

(1) Lock and key hypothesis

(2) Induced fit hypothesis

(1) Lock and key hypothesis : The hypothesis was put forward by Emil Fisher (1894) . According to this hypothesis the enzyme and its substrate have a complementary shape. The specific substrate molecules are bound to a specific site of the enzyme molecule.

(2) Induced fit hypothesis : This hypothesis was proposed by Daniel, E. Koshland (1959).

According to this view, the active sites of an enzyme are not rigid. When the substrate binds to enzyme, it may induce a change in shape of the enzyme molecule in such a way that it is fit for the substrate-enzyme interaction. The change in shape of the enzyme molecules can put strain on the substrate. This stress may help bonds to break, thus promoting the reaction. Open / Comment

2021-07-20 10:41:57 JEE Main Exam Review
20 July 2021, Shift 1

As per students,
Mathematics was quite lengthy and tough.
Chemistry was the easiest section and physics was moderate to difficult.
The difficulty level was quite same as per previous sessions.
The overall JEE Main 2021 difficulty level for July 20 Shift 1 was moderate Open / Comment

2021-07-20 05:09:40 Proteins

Introduction
Proteins, which are basically biomolecules, play wide range of functions in the body of a living organism.
Proteins are made up of tiny elements of different types of amino acids.
A sequence of amino acid residues in a protein is known particularly by the sequence of a gene; gene is encoded in the genetic code.
After formation, proteins exist for a fixed period of time and are then degraded and recycled.
The proteins get recycled by the cell's machinery by the process of protein turnover.
Most of the proteins contain linear polymers made up of series of up to 20 different L-α-amino acids.
The amino acids in a polypeptide chain are connected by peptide bonds.
The peptide bond, usually, has two resonance forms, which contribute some double-bond characters.

Protein Structure
Most of the proteins illustrate unique 3-dimensional structures.
However, proteins have not a rigid structure, but rather, proteins may vary between several related structures especially when they perform their functions.

Types of Protein
Enzymes − enzymes play important role especially during the breakdown of molecules. Enzymes are also required for the digestion and growth of the cell.
Structural Proteins − such type of proteins provide strength to cells, tissues, and organs.
Signaling Proteins − Such proteins facilitate cells to communicate with each other by providing signals.
Defensive Proteins − Such proteins help organisms to fight with infection and support damaged tissue in healing fast.
Hormone − Some hormones are proteins that help in metabolic activities. Open / Comment