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TN 12th Computer Applications மின் - வணிகம் 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 Two
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.
Bacillary dysentery is caused due to __________________
Salmonella
Shigella
Clostridium
Yersinia
2.
Which of the following are likely to be present in deep-sea water?
Archaebacteria
Eubacteria
Blue-green algae
Saprophytic fungi
3.
Due to change in the diet containing less cellulose,___________ inhuman become functionless and is reduced to a Vermiform appendix.
Small intensive
large intensive
Rectum
caecum
4.
The first living organism to be patented was________
E.coli
Saccharomyces
Pseudomonas putida
Lactobacillus
5.
__________is not linked to malaria
Haemozoin
TNF-a
Phencyclidine
Interleuin
6.
The pathogenic bacteria causing bubonic plague is______
yersinia pestis
Clostridium tetani
Shigella sp
Streptococcus pneumoniae
7.
All the following animals are continuous breeders, except.
Frogs
Honey bees
Poultry
Rabbit
8.
True about interferon is that
It is synthetic antiviral agent
It inhibits viral replication in cells
It is specific for a particular virus
It causes infection
9.
Groundnut is native of ____.
Philippines
India
North America
Brazil
10.
Deforestation means ______.
growing plants and trees in an area where there is no forest
growing plants and trees in an area where the forest is removed
growing plants and trees in a pond
Removal of plants and trees
11.
The following diagram represents
pyramid of number in a grassland ecosystem
pyramid of number in a pond ecosystem
pyramid of number in a forest ecosystem
pyramid of biomass in a pond ecosystem
12.
13.
A specific place in an ecosystem, where an organism lives and performs its functions is _____.
habitat
niche
landscape
biome
14.
The time duration for sterilization process by using autoclave is ______ minutes and the temperature is ______.
10 to 30 minutes and 125° C
15 to 30 minutes and 121° C
15 to 20 minutes and 125° C
10 to 20 minutes and 121° C
15.
Which of the following was the contribution of Hugo de Vries?
Theory of mutation
Theory of natural Selection
Theory of inheritance of acquired characters
Germplasm theory
16.
Identify the correct statements from the following.
Chlamydiasis is a viral disease
Gonorrhoea is caused by a spirochaete bacterium, Treponema palladium
The incubation period for syphilis is 2 to 14 days in males and 7 to 21 days in females
Both syphilis and gonorrhoea are easily cured with antibiotics
17.
EcoRI cleaves DNA at ____.
AGGGTT
GTATATC
GAATTC
TATAGC
18.
19.
The glandular accessory organ which produces the largest proportion of semen is ______.
Seminal vesicle
Bulbourethral gland
Prostate gland
Mucous gland
20.
The sporozoites of Plasmodium vivax are formed from ________
Gametocytes
Sporoblasts
Oocysts
Spores
21.
22.
23.
Which of the following phenotypes in the progeny are possible from the parental combination AxB?
A and B only
A,B and AB only
AB only
A, B, AB and O
24.
How many different kinds of gametes will be produced by a plant having the genotype AABbCC?
Three
Four
Nine
Two
25.
Identify the correctly matched pair.
Tuber - Allium Cepa
Sucker - Pistia
Rhizome - Musa
Stolon - Zingiber
1.
(b)
Shigella
2.
(a)
Archaebacteria
3.
(c)
Rectum
4.
(c)
Pseudomonas putida
5.
(c)
Phencyclidine
6.
(a)
yersinia pestis
7.
(a)
Frogs
8.
(b)
It inhibits viral replication in cells
9.
(d)
Brazil
10.
(d)
Removal of plants and trees
11.
(c)
pyramid of number in a forest ecosystem
12.
(b)
13.
(b)
niche
14.
(b)
15 to 30 minutes and 121° C
15.
(a)
Theory of mutation
16.
(d)
Both syphilis and gonorrhoea are easily cured with antibiotics
17.
(c)
GAATTC
18.
(b)
19.
(a)
Seminal vesicle
20.
(c)
Oocysts
21.
(c)
22.
(c)
23.
(d)
A, B, AB and O
24.
(c)
Nine
25.
(c)
Rhizome - Musa
12th Standard Syllabus & Materials
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Computer Science
Business Maths and Statistics
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Maths
Chemistry
Physics
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Accountancy
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