Which of these options are not a function of Ribosomes?
(i) It helps in manufacture of protein molecules
(ii) It helps in manufacture of enzymes
(iii) It helps in manufacture of hormones
(iv) It helps in manufacture of starch molecules
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (iv) and (i)
Chromosomes are made up of
(a) DNA
(b) protein
(c) DNA and protein
(d) RNA
A cell will swell up if
(a) The concentration of water molecules in the cell is higher than the
concentration of water molecules in surrounding medium
(b) The concentration of water molecules in surrounding medium is higher
than water molecules concentration in the cell
(c) The concentration of water molecules is same in the cell and in the
surrounding medium
(d) Concentration of water molecules does not matter
Which of the following can be made into crystal?
(a) A Bacterium
(b) An Amoeba
(c) A Virus
(d) A Sperm
In the Gold foil experiment of Geiger and Marsden, that paved the way for
Rutherford’s model of an atom, ~ 1.00% of the α-particles were found to
deflect at angles > 50º.
If one mole of α-particles were bombarded on the gold foil, compute the number of α-particles that would deflect at angles less than 500.
Show diagramatically the electron distributions in a sodium atom and a
sodium ion and also give their atomic number.
In what way is the Rutherford’s atomic model different from that of
Thomson’s atomic model?
+91 94284 01196 (WhatsApp only)
C-15, Suvidhapark Society, Amitnagar circle, Karelibaug, Vadodara (390018)
© Copyright 2025. Doubtora. All Rights Reserved
