List of practice Questions

In animal cells, lipid-like steroidal hormones are synthesized in

New cells generate from

Autonomously replicating circular extrachromosomal DNA is called

Location and secretion of Leydig's cells are

Which type of epithelium is involved in a function to move particles or mucus in a specific direction ?

$ATP$ is synthesized in

$ Pb + Conc. HNO_3$ gives

At $18^{\circ}$C, the conductance of $H^+$ and $CH_3COO^-$ at infinite dilution are $315$ and $35\, mho\, cm^ 2\, eq^{-1}$ respectively. The equivalent conductivity of $CH_3COOH$ at infinite dilution is _____ $mho\,cm^ 2\,eq^{-1}$

The fundamental frequency of an open organ pipe increases as the temperature is increased. As the temperature increases, the velocity of sound increases more rapidly than length of the pipe.

The change in kinetic energy of a particle is equal to the work done on it by the net force. Change in kinetic energy of particle is equal to the work done only in case of a system of one particle.

$S _{ N } 1$ reaction is basically a solvolysis reaction. Polar protic solvents help the substrate to ionise and by the way get involved in $S _{ N } 1$ reaction.

Open circulatory system is found in most arthropods. Arthropods contain haemolymph which directly bathes internal tissues and organs.

: Noble gases have positive electron affinity. : Noble gases have stable closed shell electronic configuration.

In cockroach respiratory gases directly comes in contact with the various organs of the body. Cockroaches do not have respiratory pigment.

Helium has the highest value of ionisation energy among all the elements known. Helium has the highest value of electron affinity among all the elements known.

Glycine, an amino acid, comes under the category of non-essential amino acids. The fact behind it is that glycine cannot be synthesized in the body.

DNA fingerprinting involves identifying differences in specific regions in DNA sequence. DNA fingerprinting is the basis of paternity testing.

Conductivity of silicon increases by doping it with group-15 elements. Doping means introduction of small amount of impurities like $P, As$ or $Bi$ into the pure crystal.

: Chlorine when solidifies does not have zero entropy even at absolute zero. : Chlorine is a pungent smelling gas and it is difficult to solidify it.

: Calcium carbide on hydrolysis gives ethylene. : Calcium carbide contains $C^{4-}$ anions.

Bond energy and bond dissociation energy have identical value for diatomic molecules. Greater the bond dissociation energy, less reactive is the bond.

Benzene on heating with conc. $H_2SO_4$ gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Sulphonation is a reversible process.

Auditory ossicles are small bones present in the cavity of inner ear. Auditory ossicles maintain the balance of air pressure between two sides of ear drum.

Adrenaline is called an emergency hormone. It acts on the cells of skeletal, cardiac, smooth muscles, blood vessels and fat cells.

A primary amine has higher boiling point than any tertiary amine. A tertiary amine has greater number of $N - H$ bonds for $H$-bonding.