12th Standard Syllabus & Materials
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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 05/11/2020
12th Standard Biology English Medium Free Online Test One Mark Questions with Answer Key 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.
Questions + Answers key
Take MCQ Biology Test1.
Identify those proper sequence of ELISA test in
Coating \(\rightarrow \) Blocking \(\rightarrow \) Detection \(\rightarrow \) Read out
Detection \(\rightarrow \) Read out\(\rightarrow \) Coating \(\rightarrow \) Blocking
Read out\(\rightarrow \) Coating \(\rightarrow \) Detection \(\rightarrow \) Blocking
Blocking \(\rightarrow \) Detection \(\rightarrow \) Read out \(\rightarrow \) Coating
2.
Pick out the incorrect statements.
The upper rounded portion of ute ius is fundus
Uterus open into vagina through narrow cervix
Cervix is the organ of copulation in female.
Vagina extends from the cervix and opens to exterior
3.
The 2018 UN climate change conference was held in ___________
Rwanda
New York
Russia
Poland
4.
Prevention of children from sexual offences is covered under ______ act
PCPNDT
patent act
ART
POCSO
5.
Test tube baby is got by _____ technique.
IUI
CVS
ICSI
IVF
6.
The transfer of sperms by the male into the female genital tract is called _____
implantation
parturition
insemination
gastrulation
7.
______ is not linked to polymenorrhoea
Shorter cycle
Gland activity
Malnutrition
Pain
8.
Testosterone is secreted by ____
spermatocytes
sperm
polar bodies
leydig cells
9.
Find out the mismatched pair
| Group | Drugs |
| Depressant | Tranquilizers |
| Group | Drugs |
| Cannabis | Morphine |
| Group | Drugs |
| Hallucinogens | LSD |
| Group | Drugs |
| Stimulants | Cocaine |
10.
Regeneration is not seen in ______
Starfish
Lizard
Hydra
Sea Anemone
11.
In, dinoflagellates the types of asexual reproduction seen is _____
Simple Binary fission
Multiple fission
Oblique binary fission
Longitudinal binary fission
12.
The relationship between sucker fish and shark is__________
Competition
Commensalism
Predation
Parasitism.
13.
With which of the following, the Agenda 21’ of Rio Summit, 1992 is related to?
Sustainable development
Combating the consequences of population
Mitigation norms of Green House Gases (GHGs) emission
Technology transfer mechanism to developing countries for ‘clean-energy’ production
14.
Transgenic animals are those which have
Foreign DNA in some of their cells
Foreign DNA in all their cells
Foreign RNA in some of their cells
Foreign RNA in all their cells
15.
Fossils are generally found in
igneous rocks
metamorphic rocks
volcanic rocks
sedimentary rocks
16.
17.
Plasmids are ______.
circular protein molecules
required by bacteria
tiny bacteria
confer resistance to antibiotics
18.
DNA and RNA are similar with respect to _____.
Thymine as a nitrogen base
A single-stranded helix shape
Nucleotide containing sugars, nitrogen bases and phosphates
The same sequence of nucleotides for the amino acid phenyl alanine
19.
The male sex hormone testosterone is secreted from _____.
Sertoli cells
Leydig cell
Epididymis
Prostate gland
20.
The sporozoite of the malarial parasite is present in ______
saliva of infected female Anopheles mosquito
RBC of human suffering from malaria.
Spleen of infected humans
Gut of female Anopheles mosquito
21.
Animals giving birth to young ones:
Oviparous
Oviviviparous
Viviparous
Both a and b
22.
The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is testcrossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?
25 AB, 25 ab, 25 Ab, 25 aB
10 AB, 10 ab
45 AB, 45 ab
45 AB, 45 ab, 5 Ab, 5aB
23.
24.
In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype _____.
aaBB
AaBB
AABB
aabb
25.
An eminent Indian embryologist is ______.
S.R. Kashyap
P. Maheswari
M.S. Swaminathan
K.C. Mehta
1.
(a)
Coating \(\rightarrow \) Blocking \(\rightarrow \) Detection \(\rightarrow \) Read out
2.
(c)
Cervix is the organ of copulation in female.
3.
(d)
Poland
4.
(d)
POCSO
5.
(d)
IVF
6.
(c)
insemination
7.
(d)
Pain
8.
(d)
leydig cells
9.
(b)
| Group | Drugs |
| Cannabis | Morphine |
10.
(d)
Sea Anemone
11.
(c)
Oblique binary fission
12.
(b)
Commensalism
13.
(b)
Combating the consequences of population
14.
(b)
Foreign DNA in all their cells
15.
(d)
sedimentary rocks
16.
(b)
17.
(d)
confer resistance to antibiotics
18.
(c)
Nucleotide containing sugars, nitrogen bases and phosphates
19.
(b)
Leydig cell
20.
(a)
saliva of infected female Anopheles mosquito
21.
(c)
Viviparous
22.
(d)
45 AB, 45 ab, 5 Ab, 5aB
23.
(a)
24.
(d)
aabb
25.
(b)
P. Maheswari
12th Standard Syllabus & Materials
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Tamilnadu Stateboard 12th Standard Subjects
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Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
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