Daily NEET MCQ- August 4, 2022 - NEET MCQ

The above statement that the periodic function of the atomic number states the physical and chemical properties of that element is the modern periodic law is changed according to Henry Moseley by these experiments.

In the most convenient and widely used periodic table of the long-form that is the modern version, the horizontal rows and the vertical columns are called as periods (series as per Mendeleev) and groups respectively.

The first period is known as the shortest period among the seven periods of the periodic table this is because it contains only two elements; one of the two elements is hydrogen which belongs to alkali metal group and the other is the Helium which is a noble gas.

The rate of change of displacement of a body is velocity. The rate of change of rate of displacement of a body, or rate of change of velocity is acceleration.

The average velocity is obtained by dividing total displacement by total time taken. Instantaneous velocity is calculated at an instant and not over a period of time. Speed is distance divided by time. Velocity is said to be uniform when velocity at every instant is equal to the average velocity.

When the body is in the state of rest, there is no motion. Hence there is no kinetic energy, hence the total energy of the body is stored as its potential energy. The total energy is the sum of kinetic and potential energies.

The full form of PPLO is Pleuro Pneumonia Like Organisms. They are a type of prokaryotic organisms, which also include bacteria, blue – green algae and mycoplasma. The lack a true nucleus.

Bacteria have four basic shapes. These are bacillus or rod – shaped, coccus or spherical shape, vibrio or comma shaped and spirillum or spiral shaped. Bacteria are a type of prokaryotic organisms.

All bacteria have a cell wall covering the cell membrane, except in the genus mycoplasma. Since all bacteria are prokaryotic organisms, they do not have a well – defined nucleus. The genetic material is naked.

Plasmids are extrachromosomal small circular DNA that is present in bacterial cell, apart from the genomic DNA. Plasmid DNA confers several special features to the cell such as resistance to certain chemicals.