Question 1

acts as a kind of energy bank in the body, and is found concentrated in muscles and liver.

Accepted Answer

Glycogen is a polysaccharide that acts as a form of energy storage in the body. It is found mainly in the liver and muscles, where it can be quickly broken down by enzymes to provide energy for the body's cells. Lactose, sucrose, and starch are all types of carbohydrates, but they do not serve as energy storage molecules in the same way that glycogen does. Cellulose is also a carbohydrate but it is not used for energy storage as it cannot be broken down by human digestive enzymes.

Question 2

Alkanes with to carbons are found in straight- run gasoline.

Accepted Answer

Straight-run gasoline typically contains alkanes with carbon numbers ranging from about 5 to 12.

Question 3

The name of CH₃- CH=C=CH- CH- CH=CH- CH₃is _ .

Accepted Answer

The answer of The name of CH₃- CH=C=CH- CH- CH=CH-...

Question 4

The general formula of an aldehyde is .

Accepted Answer

The general formula of an aldehyde is R-CHO, where R is any organic group. This formula signifies that the aldehyde functional group consists of a carbonyl group (C=O) bonded to a hydrogen atom (H) and an organic group (R). The other options, A) R-CO-R', B) R-CO-OR', C) R-O-R', and E) R-CO-OH, represent the general formulas for a ketone, ester, ether, and carboxylic acid, respectively, but not for an aldehyde.

Question 5

Carboxylic acids can be formed by oxidation of _.

Accepted Answer

Carboxylic acids can be formed by the oxidation of primary alcohols in the presence of an oxidizing agent such as potassium permanganate or chromium trioxide. Alkenes, ketones, benzene, and alkynes do not contain the necessary functional group (OH) to form a carboxylic acid upon oxidation.

Question 6

The general formula of a carboxylic acid is .

Accepted Answer

Carboxylic acids are organic compounds that contain a carboxyl group (-COOH) attached to an alkyl or aryl group. The general formula for a carboxylic acid is R-CO-OH, where R represents the alkyl or aryl group. Therefore, the best choice is A.

Question 7

Isooctane is assigned an octane number of 100, whereas is assigned an octane number of 0.

Accepted Answer

Isooctane has an octane rating of 100, and heptane has an octane rating of 0. The higher the octane rating, the more resistant a fuel is to premature detonation in an engine. Therefore, heptane would be a poor choice for a fuel, while isooctane would be a good choice.

Question 8

The secondary structure of a protein is the result of bonding.

Accepted Answer

The secondary structure of a protein is formed through hydrogen bonding between the amine and carboxyl groups of the polypeptide backbone. Ionic bonding involves the transfer of electrons, peptide bonding involves the formation of covalent bonds between amino acids, and covalent bonding involves the sharing of electrons. Therefore, the correct answer is hydrogen bonding (choice D).

Question 9

The melting and boiling points of hydrocarbons are determined by .

Accepted Answer

Hydrocarbons are non-polar molecules, which means they only have dispersion forces, also known as London forces, between their molecules. The strength of these forces increases with the size of the hydrocarbon molecule, resulting in higher melting and boiling points for larger hydrocarbons.

Question 10

The hybridization of the central carbon atom in an aldehyde is _ _.

Accepted Answer

In an aldehyde, the central carbon atom is bonded to three atoms (one hydrogen, one oxygen, and one carbon) and has no lone pairs, resulting in sp² hybridization.

Question 11

The simplest alkyne is _ .

Accepted Answer

The simplest alkyne is acetylene, which has the chemical formula C2H2 and consists of a triple bond between two carbon atoms. Ethylene is the simplest alkene, benzene is an aromatic ring, ethane is the simplest alkane, and propyne is a more complex alkyne.

Question 12

Ethers can be made by condensation of two molecules by splitting out a molecule of water.

Accepted Answer

Ethers are commonly made by condensing two alcohol molecules and eliminating a molecule of water.

Question 13

Which amino acid is non- chiral _ _?

Accepted Answer

Glycine is the only amino acid that is non-chiral because it has a hydrogen atom as its side chain R-group.

Question 14

Hydrocarbons containing carbon- carbon triple bonds are called .

Accepted Answer

Hydrocarbons containing carbon-carbon triple bonds are called alkynes.

Question 15

Hybridization of the carbon atom indicated by (*) in CH₃- ^*CH₂- CH₃, ^*CH=CH₂, and CH₃- ^*C ≡ CH is , , and

Accepted Answer

The hybridization of carbon is determined by the number of atoms it is bonded to and the number of lone pairs. In CH₃-CH₂-CH₃, the carbon is sp³ hybridized. In CH=CH₂, the carbon is sp² hybridized. In CH₃-C≡CH, the carbon is sp hybridized.

Question 16

The general formula of an alkane is .

Accepted Answer

The general formula for alkanes, which are saturated hydrocarbons, is C_nH_2n+2, where n is the number of carbon atoms.

Question 17

Starch, glycogen, and cellulose are made of repeating units of .

Accepted Answer

Starch, glycogen, and cellulose are all polysaccharides and are made up of repeating units of glucose.

Question 18

The addition of HBr to 2- butene produces _ .

Accepted Answer

The addition of HBr to 2-butene follows Markovnikov's rule, resulting in the formation of 2-bromobutane.

Question 19

How many hydroxyl groups are in a glycerol molecule ?

Accepted Answer

Glycerol has three hydroxyl groups, one on each carbon atom.

Question 20

What general class of compounds is also known as olefins ?

Accepted Answer

The general class of compounds that is also known as olefins are alkenes, which are unsaturated hydrocarbons with at least one carbon-carbon double bond.

Quiz 25: The Chemistry of Life: Organic and Biological Chemistry

acts as a kind of energy bank in the body, and is found concentrated in muscles and liver.

Alkanes with to carbons are found in straight- run gasoline.

The name of CH₃- CH=C=CH- CH- CH=CH- CH₃is _ .

The general formula of an aldehyde is .

Carboxylic acids can be formed by oxidation of _.

The general formula of a carboxylic acid is .

Isooctane is assigned an octane number of 100, whereas is assigned an octane number of 0.

The secondary structure of a protein is the result of bonding.

The melting and boiling points of hydrocarbons are determined by .

The hybridization of the central carbon atom in an aldehyde is _ _.

The simplest alkyne is _ .

Ethers can be made by condensation of two molecules by splitting out a molecule of water.

Which amino acid is non- chiral _ _?

Hydrocarbons containing carbon- carbon triple bonds are called .

Hybridization of the carbon atom indicated by () in CH₃- ^CH₂- CH₃, ^CH=CH₂, and CH₃- ^C ≡ CH is , , and

The general formula of an alkane is .

Starch, glycogen, and cellulose are made of repeating units of .

The addition of HBr to 2- butene produces _ .

How many hydroxyl groups are in a glycerol molecule ?

What general class of compounds is also known as olefins ?

Quiz 25: The Chemistry of Life: Organic and Biological Chemistry

acts as a kind of energy bank in the body, and is found concentrated in muscles and liver.

Alkanes with to carbons are found in straight- run gasoline.

The name of CH3- CH=C=CH- CH- CH=CH- CH3 is _ .

The general formula of an aldehyde is .

Carboxylic acids can be formed by oxidation of _.

The general formula of a carboxylic acid is .

Isooctane is assigned an octane number of 100, whereas is assigned an octane number of 0.

The secondary structure of a protein is the result of bonding.

The melting and boiling points of hydrocarbons are determined by .

The hybridization of the central carbon atom in an aldehyde is _ _.

The simplest alkyne is _ .

Ethers can be made by condensation of two molecules by splitting out a molecule of water.

Which amino acid is non- chiral _ _?

Hydrocarbons containing carbon- carbon triple bonds are called .

Hybridization of the carbon atom indicated by (*) in CH3- *CH2- CH3, *CH=CH2, and CH3- *C ≡ CH is , , and

The general formula of an alkane is .

Starch, glycogen, and cellulose are made of repeating units of .

The addition of HBr to 2- butene produces _ .

How many hydroxyl groups are in a glycerol molecule ?

What general class of compounds is also known as olefins ?

The name of CH₃- CH=C=CH- CH- CH=CH- CH₃is _ .

Hybridization of the carbon atom indicated by () in CH₃- ^CH₂- CH₃, ^CH=CH₂, and CH₃- ^C ≡ CH is , , and