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12th Standard Biology English Medium Free Online Test Creative One Mark Questions with Answer Key - Part Five

Published on: 05/11/2020

Download Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 12th Standard - Biology

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Questions:

Multiple Choice Question

10 x 1 = 10

Wodd Breast feeding week is observed during.

(a)

March 1^stweek

(b)

December 1^st week

(c)

August 1^stweek

(d)

July 1^stweek

Which among the following animals exhibit ovoviviparity?

(a)

frog

(b)

shark

(c)

sheep

(d)

hen

The enzyme attached to RNA of HIV is _________________

(a)

RNA polymerase

(b)

reverse transcriptase

(c)

primase

(d)

endonuclease

ABO blood group is a classical example for __________

(a)

Multiple allelism

(b)

Pleotropism

(c)

Incomplete dominance

(d)

Polygenic mechanism

What gases are produced in anaerobic sludge digesters?

(a)

Methane and CO₂ only

(b)

Methane, hydrogen sulphide and CO₂

(c)

Methane, hydrogen sulphide and O₂

(d)

Hydrogen sulphide and CO₂

Match and select the correct option

Column I	Column II
a. Proliferative phase	1. Breakdown of endometrium lining
b. Secretory phase	2. Follicular phase
c. Menstruation	3. Luteal phase

(a)

a	b	c
3	2	1

(b)

a	b	c
2	3	1

(c)

a	b	c
1	3	2

(d)

a	b	c
3	1	2

Centrifugal selection refers to ______________

(a)

Directional selection

(b)

Disruptive selection

(c)

Stabilising selection

(d)

Kin selection

In this Assisted Reproductive Technology (ART), the sperms and egg are allowed to united outside the body and then transformed into the woman's uterus.

(a)

Intra - uterine insemination (IUI)

(b)

In vitro Fertilization (IVF)

(c)

Zygote Intra - Fallopian Transfer (ZIFT)

(d)

Intra uterine transfer (IUT)

Which statement is wrong regarding the malaria?

(a)

In the human liver, the sporozoites undergo sexual fission

(b)