MCQ

 Q 1. Which one of the following is a step in the formation of soil?

(a) volcanic eruptions

(b) Weathering of rocks

(c) Addition of humus

(d) All are involved in the formation of soil

Q 2. In which horizon of soil minerals are found?

(a) A

(b) B

(c) C

(d) None of these

Q 3. Which physical property of soil is important to us? 

(a) Texture

(b) Water holding capacity

(c) Both of these

(d) None of these

Q 4.Which of the following type of soil will form a colloidal solution when suspended in water?

(a) Clay

(b) Silt

(c) Sand

(d) Gravel

Q 5.Which factor influences soil formation?

(a) Climate

(b) Vegetation

(c) Parent rock

(d) All of these

Q 6.The proportion of sand, silt and clay in a soil sample determines

(a) Structure

(b) Texture

(c) nutrient potential

(d) Fertility level

Q 7.The microorganisms present in the soil require moisture (water) and nutrients for growth and survival. Choose from the options below the habitat (place) where the soil has plenty of water and nutrients.

(a) Desert

(b) Forest

(c) Open field

(d) Cricket ground

Q 8.Availability of water and minerals in the soil for maximum absorption by roots is in the:

(a) -horizon

(b) C-horizon

(c) A-horizon

(d) Surface of soil

Q 9. Soil conservation measures are mainly aimed at protecting which of the following?

(a) Plants

(b) Topsoil

(c) Sub soil

(d) Soil organisms






Q 10. Read the following statements with reference to soil:

• Weathering is a very fast process of soil formation.

• Percolation of water is faster in sandy soils.

• Loamy soil contains only sand and clay.

• Top soil contains the maximum amount of humus.

Choose the correct statements from the above.

(a) (ii) and (iv)

(b) (i) and (iiii

(c) (ii) and (iii)

(d) (i) and (ii)




Q 11. R.Q is ratio of

(a) CO2 produced to substarate consumed

(b) CO2 produced to O2 consumed

(c) oxygen consumed to CO2 produced

(d) Oxygen consumed to water produced

Q 12 Angiosperm pollen is generally released at the

(a) 1 – celled stage

(b) 2 – celled stage

(c) 3 – celled stage

(d) 88k gamete formation stage

Q 13. The complete oxidation of pyruvate take place in

(a) Cell cytoplasm

(b) Inner mitochondrial membrane

(c) mitochondrial matrix

(d) Nucleus

Q 14. Which enzyme catalyses the reaction below? Pyruvic acid → Carbon dioxide + Ethanol

(a) Pyruvic acid decarboxylase

(b) Alcohol dehydrogenase

(c) None of these

(d) Both of these

Q 15.TCA cycle was discovered by

(a) Otto Meyerhof

(b) Hans Kreb

(c) Gustav Embden

(d) All of these



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