Daily NEET MCQ- August 8, 2022 - NEET MCQ

In chemical properties of alkenes, HCL, hydrogen Bromide and hydrogen iodide are added to alkenes to form alkyl halides as per their reactivity order that is; hydrogen iodide’s reactivity is greater than that of hydrogen Bromide and it is greater than that of HCL.

The intermediate conformation between eclipsed and staggered is known as skew and gauche formations. The eclipsed form is least stable but the staggered form is the most stable due to the greater distance between the bond pairs or lesser torsional strain.

The acidic behavior depends upon the hybridization of the molecule as we know that alkane has sp3 hybridization, alkane has sp² hybridization and alkynes has sp hybridization, due to the higher percentage of s-character, alkyne becomes highly acidic when compared with alkene and alkane.

Efficiency is defined as work done/heat input.
Work done = 5-3=2J.
Heat input = 5J.
Thus, efficiency = 2/5.

 The function for velocity can be derived by differentiating the equation with respect to t. v = 2(t-4) is the required function. When t = 5, v = 2(5-4) = 2.

The instantaneous velocity will increase with time. If the motion is accelerated, no matter if the acceleration is constant, or variable, the instantaneous velocity will increase. Variation of acceleration describes how to change in velocity is changing.

Cell cycle involves duplication of the genome, division of the parent cell into two daughter cells, synthesis of cell organelles for the daughter cells, but centrosomes are not degenerated.

The duration of the cell cycle of the single celled fungi yeast takes 90 minutes. This means that it undergoes interphase and M phase to produce two new identical daughter cells through cell division.

The cell cycle is broadly classified into two phases-the interphase and the M phase. The M phase is the one in which actual cell division takes place. It occurs rapidly and takes up 95% of the duration of the cell cycle.

Melanocytes, osteocytes and liver cells show cell division. Heart cells do not show cell division as the cells have exited the G1 or first gap phase in order to enter a quiescent stage or the G0 phase.