New ! Biology MCQ Practise Tests

12th Standard Biology English Medium Free Online Test Book Back 1 Mark Questions with Answer Key - Part Three

12th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Biology

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10
  1. Mammalian egg is

    (a)

    Mesolecithal and non cleidoic

    (b)

    Microlecithal and non cleidoic

    (c)

    Alecithal and non cleidoic

    (d)

    Alecithal and cleidoic

  2. A – Ovulation is the release of ovum from the Graafian follicle.
    R – It occurs during the follicular phase of the menstrual cycle.

    (a)

    A and R are true, R is the correct explanation of A

    (b)

    A and R are true, R is not the correct explanation of A

    (c)

    A is true, R is false

    (d)

    Both A and R are false

  3. Assertion : Agrobacterium tumifaciens is popular in genetic engineering because this bacteriumis associated with the root nodules of all cereals and pulse crops
    Reason: A gene incorporated in the bacterial chromosomal genome gets atomatically transferred to the cross with which bacterium is associated.

    (a)

    Both assertion and reason are true. But reason is correct explanation of assertion.

    (b)

    Assertion is true, but reason is false.

    (c)

    Assertion is false, but reason is true

    (d)

    Both assertion and reason are false.

  4. The prevention of large scale loss of biological interity

    (a)

    Biopatent

    (b)

    Bioethics

    (c)

    Biosafety

    (d)

    Biofuel

  5. Pedogenesis refers to

    (a)

    Fossils

    (b)

    Water

    (c)

    Population

    (d)

    Soil

  6. Which one is in descending order of a food chain

    (a)

    Producers \(\rightarrow \) Secondary consumers \(\rightarrow \) Primary consumers \(\rightarrow \) Tertiary consumers

    (b)

    Tertiary consumers \(\rightarrow \) Primary consumers \(\rightarrow \)Secondary consumers \(\rightarrow \) Producers

    (c)

    Tertiary consumers \(\rightarrow \) Secondary consumers \(\rightarrow \) Primary consumers \(\rightarrow \) Producers

    (d)

    Tertiary consumers \(\rightarrow \) Producers \(\rightarrow \) Primary consumers \(\rightarrow \) Secondary consumers

  7. Deforestation means

    (a)

    growing plants and trees in an area where there is no forest

    (b)

    growing plants and trees in an area where the forest is removed

    (c)

    growing plants and trees in a pond

    (d)

    Removal of plants and trees

  8. A wheat variety, Atlas 66 which has been used as a donor for improving cultivated wheat, which is rich in

    (a)

    iron

    (b)

    carbohydrates

    (c)

    proteins

    (d)

    vitamins

  9. The active principle trans-tetra hydro canabial is present in

    (a)

    Opium

    (b)

    Curcuma

    (c)

    Marijuana 

    (d)

    Andrographis

  10. Which is not a macrophage?

    (a)

    Monocyte

    (b)

    Microglia

    (c)

    Kupffer cell

    (d)

    Lymphocyte

*****************************************

TN 12th Standard Biology free Online practice tests

Reviews & Comments about 12th Standard Biology English Medium Free Online Test Book Back 1 Mark Questions with Answer Key - Part Three

Write your Comment