The fundamental particles found in the nucleus of an atom are:
(A) Electron, Proton
(B) Proton, Neutron
(C) Neutron, Electron
(D) Neutron, Positron
The energy of an electron revolving in an atom:
(A) Cannot be negative
(B) Can have any value greater than zero
(C) Can never be positive
(D) is always positive
Mass number of nucleus :
(A) always less than its atomic number
(B) always greater than its atomic number
(C) always equal to its atomic number
(D) sometimes greater than and sometimes equal to its atomic number
The electronic configuration of an atom with atomic number '20' is :
(A) 2, 8, 10
(B) 2, 6, 8, 4
(C) 2, 8, 8, 2
(D) 2, 10, 8
The difference between the isotopes of an element is due to the presence of different numbers of
(A) Proton
(B) Newton
(C) Electron
(D) Photon
Randhra Mukha (gate) is based on
(A) Exosmosis
(B) Endosmosis
(C) Cytoplasmic contraction in guard cells
(D) Decrease in the concentration of cell sap
The largest unicellular organism is
(A) Yeast
(B) Acetebularia
(C) Acetobacter
(D) Amoeba
The excretory pore in Paramecium is known as :
(A) Pharynx
(B) Cell mouth
(C) Cytophyse
(D) Cryptosphere
In which of the following kidney-shaped guard cells are present?
(A) in dicot plants
(B) in monoecious plants
(C) both of the above
(D) in algae
What is involved in the process of end-exploitation?
(A) Diffusion
(B) Cell Function
(C) Absorption
(D) BOTH A AND B
Get the Examsbook Prep App Today