Q.1. Movement of cell against concentration gradient is called
(A) osmosis
(B) active transport
(C) diffusion
(D) passive transport
Answer. (B) Active transport, this is the only transport method that can move species against their concentration gradient (from low to high concentration) . Facilitated diffusion only moves species down their concentration gradient from high to low concentration.
Q.2. Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to
(A) gymnosperms
(B) angiosperms
(C) monocotyledons
(D) dicotyledons
Answer (A) Gymnosperms refers to non flowering plants. Hence the plants mentioned above are non flowering plants.
Q.3. Mycobacterium leprae causes leprosy, Corynebacterium diphtheria causes diphtheria and Vibrio comma causes
(A) tetanus
(B) influenza
(C) cholera
(D) typhoid
Answer (C) Vibrio cholerae (also Kommabacillus) is a gram negative comma-shaped bacterium with a polar flagellum that causes cholera in humans
Q.4. Pollination by wind is called
(A) anemophily
(B) hydrophily
(C) zoophily
(D) entomophily
Answer. (A) Anemophily - pollination by wind.
Hydrophily - by water.
Zoophily - by vertebrates.
Entomophily - by insects.
Q.5. Ptyalin is an enzyme produced in the
(A) salivary glands
(B) pituitary glands
(C) thyroid glands
(D) pancreas
Answer. (A) Ptyalin is a salivary amylase. It is an enzyme produced in salivary gland.
Q.6. 'Mirchchhakatika' was written by
(A) Vikramaditya
(B) Shudraka
(C) Kalhana
(D) Banabhatta
Answer. (B) Mirchchakatika, a play was written by shudarka, a writer of Sanskrit from Ujjain.
Q.7. One should not connect a number of electrical appliances to the same power socket because
(A) this can damage the appliances due to overloading
(B) this can damage the domestic wiring due to overloading
(C) this can damage the electrical meter
(D) the appliance will not get full voltage
Answer.(B) If you connects too much appliances in parallel circuit & switched on same time then maximum amount of current is drawn. Sockets will be over heated and produces sparking due to which wiring w'll be burn.
Q.98. Nuclear sizes are expressed in a unit named
(A) angstrom
(B) newton
(C) tesla
(D) Fermi
Answer. (D) Fermi - A unit of length equal to 10-15 meter (one femtometer) , used in nuclear physics. It is similar to the diameter of a proton.
Q.9. Large astronomical telescopes always use as objective
(A) lens
(B) mirror
(C) combinations of lenses
(D) None of the above
Answer.(C) In astronomical telescopes multiple lenses are connected with some desired angles so that everything can be seen from a particular distance.
Q.10. Identify the vector quantity from the following
(A) Heat
(B) Angular momentum
(C) Time
(D) Work
Answer (B) It is only angular momentum which has both direction and magnitude.
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MAHENDRA GURU