Q11. By what name are those single atomic particles which have properties opposite to those of normal sub-atomic particles known?
(A) Photol
(B) Positron
(C) Neutrino
(D) Particles
(D) Particles
Q12. The reason for the milk to coagulate into curd is-
(A) Mycobacterium
(B) Lactobacillus
(C) Yeast
(D) Staphylococcus
(B) Lactobacillus
Q13. Which of the following substances is not a mixture?
(A) Brass
(B) Glass
(C) Steel
(D) Graphite
(D) Graphite
Q14. Which of the following is also called the ‘power plant of the cell’?
(A) Mitochondria
(B) Golgi bodies
(C) Lysosome
(D) Ribosome
(A) Mitochondria
Q15. Which of the following is the controlling center of the cell?
(A) Plasma
(B) Lysosome
(C) Nucleus
(D) Chromosome
(C) Nucleus
Q16. Ice is floating on water in a beaker. When the ice melts completely, the level of water in the beaker will be –
(A) Will remain the same
(B) Will decrease
(C) First it will increase and then it will decrease
(D) Will increase
(A) Will remain the same
Q17. The plum pudding model for an atom was given by?
(A) Ernest Rutherford
(B) Antoine Lavoisier
(C) Robert Boyle
(D) J.J. Thomson
(D) J.J. Thomson
Q18. Which one of the following cellular organelles contains DNA?
(A) Formula, biomass art, nucleus
(B) Chloroplasts, nucleus, ribosomes
(C) Mitochondrite, nucleus, chloroplast
(D) Nucleolus, Golgi body, nucleus
(C) Mitochondrite, nucleus, chloroplast
Q19. The primary function of RNA is-
(A) Protein synthesis
(B) To translate
(C) Photosynthesis
(D) Making replication
(A) Protein synthesis
Q20. Which of the following is not a nucleon?
(A) Neutron
(B) Proton
(C) Positron
(D) Electron
(D) Electron