Why Chemical Bonds Are Formed ?

Why Chemical Bonds Are Formed ?
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It is difficult to say the exact cause of chemical bonding. Chemists, however, believe that chemical bonds are caused by the attachment of elements to each other.
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What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor absorbed Correct (4) Answer – (1) energy is always absorbed Explanation: If a bond is broken, energy is released; and if a bond is formed, energy must have been absorbed. As these occur, a change in the chemical energy of the system also occurs. Within each bond of a molecule is an experimentally determined amount of enemy that upon the breaking of that bond is released into the chemical system. The energy within these bonds are 'stored' and can be easily thought of as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.

Description : What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor ... as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.

Last Answer : Silver nitrate solution is kept in brown bottles in laboratory because - (1) it reacts with ordinary white bottles (2) brown bottles stops the passage of light through it (3) brown bottles do not react with it (4) brown bottles react with it

How peptide bonds are formed? -Biology

Description : How peptide bonds are formed? -Biology

Last Answer : answer:

In DNA, three hydrogen bonds are formed between (A) Adenine and guanine (B) Adenine and thymine (C) Guanine and cytosine (D) Thymine and cytosine

Description : In DNA, three hydrogen bonds are formed between (A) Adenine and guanine (B) Adenine and thymine (C) Guanine and cytosine (D) Thymine and cytosine

Last Answer : Answer : C

The active site of an enzyme is formed by (A) R group of amino acids (B) NH2 group of amino acids (C) CO group of amino acids (D) Sulphur bonds which are exposed

Description : The active site of an enzyme is formed by (A) R group of amino acids (B) NH2 group of amino acids (C) CO group of amino acids (D) Sulphur bonds which are exposed

Last Answer : Answer : A

The active site of an enzyme is formed by a few of the enzymes: (A) R groups of the amino acids (B) Amino groups of the amino acids (C) Carboxyl group of the amino acids (D) Exposed sulfur bonds

Description : The active site of an enzyme is formed by a few of the enzymes: (A) R groups of the amino acids (B) Amino groups of the amino acids (C) Carboxyl group of the amino acids (D) Exposed sulfur bonds

Last Answer : Answer : C

Bonds that are formed between two cysteine residues is (A) Disulphide (B) Peptide (C) Electrostatic (D) Hydrophobic

Description : Bonds that are formed between two cysteine residues is (A) Disulphide (B) Peptide (C) Electrostatic (D) Hydrophobic

Last Answer : Answer : A

The only correct statement about chymotrypsin is (A) It is formed from trypsin (B) Carboxypeptidase converts trypsin into chymotrypsin (C) Its optimum pH is around 7 (D) It hydrolyses peptide bonds involving basic amino acids

Description : The only correct statement about chymotrypsin is (A) It is formed from trypsin (B) Carboxypeptidase converts trypsin into chymotrypsin (C) Its optimum pH is around 7 (D) It hydrolyses peptide bonds involving basic amino acids

Last Answer : Answer : C

All the following statements about pepsin are correct except (A) It is smaller than pepsinogen (B) It is formed by the action of HCl on its precursor (C) Its optimum pH is 1.0–2.0 (D) It hydrolyses the C-terminal and N-terminal peptide bonds of proteins

Description : All the following statements about pepsin are correct except (A) It is smaller than pepsinogen (B) It is formed by the action of HCl on its precursor (C) Its optimum pH is 1.0–2.0 (D) It hydrolyses the C-terminal and N-terminal peptide bonds of proteins

Last Answer : Answer : D

α-Helix is formed by (A) Hydrogen bonds (B) Hydrophobic bonds (C) Electrostatic bonds (D) Disulphide bonds

Description : α-Helix is formed by (A) Hydrogen bonds (B) Hydrophobic bonds (C) Electrostatic bonds (D) Disulphide bonds

Last Answer : Answer : A

Primary structure of a protein is formed by (A) Hydrogen bonds (B) Peptide bonds (C) Disulphide bonds (D) All of these

Description : Primary structure of a protein is formed by (A) Hydrogen bonds (B) Peptide bonds (C) Disulphide bonds (D) All of these

Last Answer : Answer : B

Electrostatic bonds can be formed between the side chains of (A) Alanine and leucine (B) Leucine and valine (C) Asparate and glutamate (D) Lysine and aspartate

Description : Electrostatic bonds can be formed between the side chains of (A) Alanine and leucine (B) Leucine and valine (C) Asparate and glutamate (D) Lysine and aspartate

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At the lowest energy level α-helix of polypeptide chain is stabilised (A) By hydrogen bonds formed between the H of peptide N and the carbonyl O of the residue (B) Disulphide bonds (C) Non polar bonds (D) Ester bonds

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Last Answer : Answer : A

Which of the following is not characteristic of a p bond? (a) A p bond results from lateral overlap of atomic orbitals (b) A p bond may be formed by the overlap of p - or d - orbitals (c) p bonds are obtained from hybrid orbitals (d) p bonds is formed when a bond already exists

Description : Which of the following is not characteristic of a p bond? (a) A p bond results from lateral overlap of atomic orbitals (b) A p bond may be formed by the overlap of p - or d - orbitals (c) p bonds are obtained from hybrid orbitals (d) p bonds is formed when a bond already exists

Last Answer : Ans:(c)

The maximum number of covalent bonds formed by nitrogen is (a) 1 (b) 2 (c) 3 (d) 4

Description : The maximum number of covalent bonds formed by nitrogen is (a) 1 (b) 2 (c) 3 (d) 4

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Bonds formed by the sharing of an electron pair between two atoms are known as - (1) Covalent bonds (2) Ionic bonds (3) Weak bonds (4) None of the above

Description : Bonds formed by the sharing of an electron pair between two atoms are known as - (1) Covalent bonds (2) Ionic bonds (3) Weak bonds (4) None of the above

Last Answer : (1) Covalent bonds Explanation: Bonds which are formed by the sharing of an electron pair between two atoms are known as covalent bonds.

The bonds formed by sharing of electrons between the atoms is called?

Description : The bonds formed by sharing of electrons between the atoms is called?

Last Answer : Covalent bond

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Description : Hydrophobic bonds are formed in protein be- tween which amino acids?

Last Answer : Valine, leucine and isoleucine residues. 

The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because (a) a proton gradient forms across the inner membrane(b) there is a change in the permeability of the inner mitochondrial membrane toward adenosine diphosphate (ADP) (c) high energy bonds are formed in mitochondrial proteins (d) ADP is pumped out of the matrix into the intermembrane space.

Description : The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because (a) a proton gradient forms across the inner membrane (b) there is a ... mitochondrial proteins (d) ADP is pumped out of the matrix into the intermembrane space.

Last Answer : (a) a proton gradient forms across the inner membrane

Hydrogen bonds are formed when a hydrogen atom is shared between two ____. a. molecules c. elements b. atoms d. neutrons

Description : Hydrogen bonds are formed when a hydrogen atom is shared between two ____. a. molecules c. elements b. atoms d. neutrons

Last Answer : a. molecules

Covalent bonds are formed by the sharing of a pair of ____. a. atoms c. electrons b. neurons d. protons

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Description : Pi bonds are formed by the overlap of what specific type of orbitals: 

Last Answer : ANSWER: UNHYBRIDIZED P ORBITALS

Pi bonds are formed by the overlap of: w) unhybridized p orbitals x) sp2 hybridized orbitals y) sp hybridized orbitals z) unhybridized s orbitals

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How many types of chemical bonds ?

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Why does neon not form chemical bonds?

Description : Why does neon not form chemical bonds?

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What form of electromagnetic radiation is most destructive to chemical bonds in living tissue?

Description : What form of electromagnetic radiation is most destructive to chemical bonds in living tissue?

Last Answer : Gamma rays

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Description : What is released when chemical bonds are broken but cannot be used to make ATP?

Last Answer : Heat

What happens to chemical bonds during chemical change?

Description : What happens to chemical bonds during chemical change?

Last Answer : What is the answer ?

When food is exposed to air it can lose electrons. This loss of electrons creates reactive molecules that work to destroy the chemical bonds in the food causing it to spoil. what are these reactive molecules called?

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Last Answer : Free radicals

What kind of energy is stored in chemical bonds?

Description : What kind of energy is stored in chemical bonds?

Last Answer : Potential energy

What kind of energy is stored in chemical bonds?

Description : What kind of energy is stored in chemical bonds?

Last Answer : Potential energy

The chemical forces that bind most coenzymes and substrates to enzymes such as LDH are (A) Hydrogen bonds (B) Peptide bonds (C) Coordinate bonds (D) Covalent bonds

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Last Answer : Answer : D

Why is moist heat more versatile than dry heat? a. It More Easily Penetrates Materials. b. Water Molecules Conduct Heat Better Than Air c. It Denatures Proteins By Changing Their Structure And Chemical Bonds d. A-C Are Correct

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What is the extremely large amount of energy associated with the strong bonds within the nucleus of the atom itself called?  A. Chemical energy  B. Latent energy  C. Phase energy  D. Nuclear energy

Description : What is the extremely large amount of energy associated with the strong bonds within the nucleus of the atom itself called?  A. Chemical energy  B. Latent energy  C. Phase energy  D. Nuclear energy

Last Answer : Nuclear energy

What is the internal energy associated with the atomic bonds in a molecule called?  A. Chemical energy  B. Latent energy  C. Phase energy  D. State energy

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Last Answer : Chemical energy

Which types of chemical bonds are the weakest? a. covalent c. ionic b. Van der Waals d. none of the above

Description : Which types of chemical bonds are the weakest? a. covalent c. ionic b. Van der Waals d. none of the above

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What has the most energy in its chemical bonds? a) AMP b) ADP c) ATP d) All are equal

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Last Answer : ANSWER: C -- ATP