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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
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Published on: 05/11/2020
12th Standard Biology English Medium Free Online Test 1 Mark Questions 2020 - Part Six
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.
A pair of fungal disease _____________
Amoebiasis, Kala-azar
Candidiasis, Athlete's foot
Ascariasis, Filariasis
Poliomyelitis, Amoebiasis
2.
A vector should________
(i) contain suitable marker
(ii) contain ori site
(iii) have poly linkess
(iv) be small in size
i, ii and iii
ii, iii and iv
i, ii and iv
all the above
3.
Observe the diagram and select the correct option denoting the proper sequence of parts.
| A | B | C | D |
|---|---|---|---|
| Isthmus | Fimbriae | Infundibulum | Uterus |
| A | B | C | D |
|---|---|---|---|
| Fimbriae | Infundibulum | Uterus | Isthmus |
| A | B | C | D |
|---|---|---|---|
| Infundibulum | Uterus | Isthmus | Fimbriae |
| A | B | C | D |
|---|---|---|---|
| Fimbriae | Infundibulum | Uterus | Fimbriae |
4.
Sharbati Sonora is a mutant wheat variety which is developed by irradiating the seeds with _________
Thermal neutrons
Gamma radiation
X-rays
UV radiations
5.
Factor hypothesis was proposed by _________
Reginald Punnett
W. Bateson
Gregor Mendel
Carl Correns
6.
Assertion (A): Pleiotropic gene affects multiple traits
Reason (R): ABO blood group is an example for Pleiotropy
A and R are correct R explains A
A and R are incorrect
A is correct R is incorrect
A is incorrect R is correct
7.
The term used to define the ability of a cell to generate entire individual is
Pluripotent
Totipotent
Multipotent
Unipotent
8.
The highest DDT concentration in aquatic food chain shall occur in
Seagull
Crab
Cell
Phytoplankton
9.
People who have migrated from the planes to an area adjoining Rohtang Pass about six months back
Have more RBC's and their haemoglobin has a lower binding affinity to O2
Are not physically fit to play games like football
Suffer from altitude sickness with symptoms like nausea, fatigue, etc.
Have the usual RBC count but then haemoglobin has very high binding affinity to O2.
10.
_____ is a cause of infertility in women.
varicocele
Endometriosis/Uterine fibroids
well developed ovaries
hormonal balance
11.
____________ era is called Golden age of reptiles.
Paleozoic
Mesozoic
Precambrian
Cenozoic
12.
Fatigue, jaundice, fever, rash, stomach pain, liver Cirrhosis and liver failure - are the symptoms of
Chalmydiasis
Lynphogvanuloma Veneveum
Hepatitis
Syphilis
13.
Stem cells that can differentiate into various types of cells that are related in an organism is called
Multipotent
Oligopotent
Pluripotent
Unipotent
14.
The _____ prevents poly spermy.
vitelline membrane
fertilization membrane
zona pellucida
corona radiata
15.
Chromosome __________ has 231 genes only.
X
19
Y
22
16.
_________Can be confirmed by widal test.
Tuberculisis
Cholera
Typhoid
Hepatitis
17.
_______is unique for DNA.
Adenine
Uracil
Guanine
Thymine
18.
This is a method of sexual reproduction in which individuals of the same species temporarily write and exchange certain. amount of nuclear material and then get separated.
Syngamy
Conjugation
Parthenogenesis
Paedogenesis
19.
The XX - XY type of sex determination is also known as ________ type.
Haploid - diploid
Lygaeus
Gynandromorphs
Genic balance
20.
What type of human population is represented by the following age pyramid?

Vanishing population
Stable population
Declining population
Expanding population
21.
Ophrys an orchid resembling the female of an insect so as to able to get pollinated is due to phenomenon of ______.
Myrmecophily
Ecological equivalents
Mimicry
None of these
22.
Which of the following is not involved in nitrogen fixation?
Pseudomonas
Azotobacter
Anabaena
Nostac
23.
24.
Find the wrongly matched pair.
Bleeding phase- fall in oestrogen and progesterone
Follicular phase-rise in oestrogen
Luteal phase - rise in FSH level
Ovulatory phase - LH surge
25.
Which of the following phenotypes is not possible in the progeny of the parental genotypic combination IAIO x IAIB?
AB
O
A
B
1.
(b)
Candidiasis, Athlete's foot
2.
(d)
all the above
3.
(b)
| A | B | C | D |
|---|---|---|---|
| Fimbriae | Infundibulum | Uterus | Isthmus |
4.
(b)
Gamma radiation
5.
(b)
W. Bateson
6.
(c)
A is correct R is incorrect
7.
(b)
Totipotent
8.
(a)
Seagull
9.
(a)
Have more RBC's and their haemoglobin has a lower binding affinity to O2
10.
(b)
Endometriosis/Uterine fibroids
11.
(b)
Mesozoic
12.
(c)
Hepatitis
13.
(a)
Multipotent
14.
(b)
fertilization membrane
15.
(c)
Y
16.
(d)
Hepatitis
17.
(a)
Adenine
18.
(b)
Conjugation
19.
(b)
Lygaeus
20.
(b)
Stable population
21.
(c)
Mimicry
22.
(a)
Pseudomonas
23.
(c)
24.
(c)
Luteal phase - rise in FSH level
25.
(b)
O
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Physics

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Economics

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Accountancy

History

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Biology

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Computer Applications

Computer Science

Business Maths and Statistics

Commerce

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Maths

Chemistry

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History

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