Bihar Board 12th Biology Objective Important Questions Part 2

Bihar Board 12th Biology Objective Important Questions Part 2

BSEB 12th Biology Objective Important Questions Part 2

Question 1.
Ecosystem represented by a pond is said to be:
(a) Lentic
(b) Lotic
(c) Xeric
(d) Benthic
Answer:
(a) Lentic

Question 2.
The tiny free swimming animals on the surface of water constitute:
(a) Phytoplankton
(b) Symbionts
(c) Benthos
(d) Zooplankton
Answer:
(d) Zooplankton

Question 3.
The 10% law for energy transfer in food chains was given by:
(a) Stanley
(b) Tansley
(c) Lindemann
(d) Weismann
Answer:
(c) Lindemann

Question 4.
Ozone depletion is caused by:
(a) CO
(b) PAN
(c) CFCs
(d) None of these
Answer:
(c) CFCs

Question 5.
Most harmful environmental pollutants are:
(a) Human organic wastes
(b) Natural nutrients in excess
(c) Nanbiodegradable chemicals
(d) Nitrogenous wastes
Answer:
(c) Nanbiodegradable chemicals

Question 6.
Smog is a combination of:
(a) Smoke & fog
(b) Water & smoke
(c) Air & Water
(d) Fire & Water
Answer:
(a) Smoke & fog

Question 7.
Greenhouse effect is due to:
(a) CO₂
(b) CO
(c) NO
(d) PO₄
Answer:
(a) CO₂

Question 8.
Secondary sewage treatment is mainly a:
(a) Physical process
(b) Mechanical process
(c) Chemical process
(d) Biological process
Answer:
(d) Biological process

Question 9.
Lichens are described as indicator of:
(a) Air pollution
(b) Water pollution
(c) Soil pollution
(d) Agriculture productivity
Answer:
(a) Air pollution

Question 10.
In followings which one is not a greenhouse gas:
(a) CO₂
(b) N₂O
(C) CH₄
(d) Ethane
Answer:
(d) Ethane

Question 11.
In agriculture biotechnology the main technique used:
(a) Transformation
(b) Tissue culture
(c) Plant reproduction
(d) DNA replication
Answer:
(b) Tissue culture

Question 12.
The medicine prepared by biotechnology is used in cancer therapy:
(a) Interferon
(b) HGH
(c) TSH
(d) Insulin
Answer:
(a) Interferon

Question 13.
First transgenic plant was:
(a) Pea
(b) Tisi
(c) Tobacco
(d) Cotton plant
Answer:
(c) Tobacco

Question 14.
Bacillus Thuriengensis strains are used practically for:
(a) Bio metallurgical technique
(b) Bio mineral process
(c) Bio insecticidal plant
(d) Biofertilizer
Answer:
(c) Bio insecticidal plant

Question 15.
In cheese industry rennin is used that is:
(a) Alkaloid
(b) Enzyme
(c) Fungi
(d) Hormone
Answer:
(b) Enzyme

Question 16.
In Golden rice which one vitamin is found:
(a) Vitamin A
(b) Vitamin B₁₂
(c) Vitamin C
(d) Vitamin D
Answer:
(a) Vitamin A

Question 17.
Which one is the best fertilizer?
(a) Synthetic fertilizer
(b) Bacillus thuringiensis & Lichen
(c) Azolla & Cyanobacteria
(d) All of the above
Answer:
(c) Azolla & Cyanobacteria

Question 18.
Biogas is:
(a) CO₂
(b) H₂S
(c) CH₄
(d) All of these
Answer:
(c) CH₄

Question 19.
Which of the following is single celled protein?
(a) Spirulina
(b) Chlorella
(c) Syndesmus
(d) All of these
Answer:
(d) All of these

Question 20.
Cyanobacteria is used as biofertilizer in:
(a) Wheat
(b) Paddy
(c) Maize
(d) Sugarcane
Answer:
(b) Paddy

Question 21.
The group of bacteria those are used in production of biogas Is called:
(a) Methanotroph
(b) Organotroph
(c) Eubacteria
(d) Methanogen
Answer:
(d) Methanogen

Question 22.
Azolla forms symbiotic combination with:
(a) Chlorella
(b) Nostoc
(c) Anabaena
(d) E. Coli
Answer:
(c) Anabaena

Question 23.
If BOD of sample water is very high, The sample is:
(a) Highly polluted
(b) Less Polluted
(c) Not polluted
(d) Potable
Answer:
(a) Highly polluted

Question 24.
The first antibiotic was discovered by:
(a) Robert Koch
(b) Louis Pasteur
(c) W. Flemming
(d) A. Flemming
Answer:
(d) A. Flemming

Question 25.
Who discovered recombinant DNA (r-DNA) technology?
(a) Har Gobind Khorana
(b) James D. Watson
(c) Stanley cohen & Herbert Boyer
(d) Walter Sutton & Avery
Answer:
(c) Stanley cohen & Herbert Boyer

Question 26.
Cry I endotoxin obtained from Bacillus thuringiens is are effective against:
(a) Nematodes
(b) Boll Worms
(c) Mosquitoes
(d) Flies
Answer:
(b) Boll Worms

Question 27.
In following which is the first national park is India?
(a) Bandipur
(b) Corbett
(c) Kanha
(d) Dwdwa
Answer:
(b) Corbett

Question 28.
Which organisation is responsible for preparation of ‘Red Data Book’ information?
(a) IUCN
(b) CITES
(c) WWF
(d) IBWL
Answer:
(a) IUCN

Question 29.
Wildlife protection act was presented in:
(a) 1972
(b) 1981
(c) 1986
(d) 1991
Answer:
(a) 1972

Question 30.
Kaziranga Natioinal Park is in:
(a) Bengal
(b) Assam
(c) Kerala
(d) Karnataka
Answer:
(b) Assam

Question 31.
Kanha National Park is famous for protection of:
(a) Birds
(b) Rhinoceros
(c) Tigers
(d) Crocodiles
Answer:
(c) Tigers

Question 32.
Biodiversity hot spots in world is:
(a) 9
(b) 25
(c) 34
(d) 38
Answer:
(c) 34

Question 33.
Fluoride pollution affects mainly which organ?
(a) Teeth
(b) Kidney
(c) Brain
(d) Heart
Answer:
(a) Teeth

Question 34.
In following which one is greenhouse gas?
(a) CFC, CH₄, NO₂ & CO₂
(b) CFC, CO₂, NH₂ & N₂
(c) CO₂, CO, NH₃ & NH₂
(d) CFC, N₂, CO₂ & NH₂
Answer:
(a) CFC, CH₄, NO₂ & CO₂

Question 35.
Ozone layer is found in which stratification?
(a) Stratosphere
(b) Lithosphere
(c) Troposphere
(d) Hemisphere
Answer:
(a) Stratosphere

Question 36.
Chipko movement has established for protection of:
(a) Grassland
(b) Forests
(c) Mountain
(d) River
Answer:
(b) Forests

Question 37.
In acid rain, SO₂ is found in percentage of:
(a) 100%
(b) 30%
(c) 70%
(d) 50%
Answer:
(c) 70%

Question 38.
In ‘Red Data Book’ which type of species are listed?
(a) Rare species
(b) Rare and endangered species
(c) Endangered species
(d) None of these
Answer:
(b) Rare and endangered species

Question 39.
Invertebrates the endangered species are more of what group of animals
(a) Fishes
(b) Reptiles
(c) Birds
(d) Mammals
Answer:
(d) Mammals

Question 40.
In followings which one is a disease of hen?
(a) Cholera
(b) Smut
(c) Ranikhet
(d) Cold & Cough
Answer:
(c) Ranikhet

Question 41.
From one cell of plant whole plant can be formed. This property is called
(a) Cloning
(b) Somacloning
(c) Totipotency
(d) None of these
Answer:
(b) Somacloning

Question 42.
In man ring warm disease develops by:
(a) Bacteria
(b) Viruses
(c) Fungi
(d) Nematode
Answer:
(c) Fungi

Question 43.
Which term of Plasmodium infects man?
(a) Merozoites
(b) Trophozoites
(c) Sporozoites
(d) Gametocytes
Answer:
(c) Sporozoites

Question 44.
Male has originated by cross between:
(a) Female horse and male donkey
(b) Male horse and female donkey
(c) Bull and female horse
(d) None of these
Answer:
(a) Female horse and male donkey

Question 45.
Bikaneri ewes and Marino rams crossing, a new breed of sheep developed called:
(a) Bhakarwal
(b) Nellore
(c) Lincoin
(d) Hisardale
Answer:
(d) Hisardale

Question 46.
Improved varieties of wheat suitable for Indian climates have been developed by:
(a) Hybridisation and mutation
(b) Mutation & cloning
(c) Cloning of polyploids
(d) Polyploidy & hybridization
Answer:
(a) Hybridisation and mutation

Question 47.
Somacloruil variation can be obtained by:
(a) Hybridization
(b) Application of colchicine
(c) Irradiation with gamma rays
(d) Tissue culture
Answer:
(d) Tissue culture

Question 48.
Spirulina is a rich source of:
(a) Protein
(b) vitamins
(c) Minerals
(d) Lipids
Answer:
(a) Protein

Question 49.
Which one of the followings is a marine fish?
(a) Carp
(b) Catla
(c) Hilsa
(d) Nohu
Answer:
(c) Hilsa

Question 50.
Which one of the following products is used in cosmetics and polishes?
(a) Oil
(b) Wax
(c) Royal jelly
(d) Honey
Answer:
(b) Wax

Question 51.
The loss of one chromosomes creates a condition called:
(a) Trisomy
(b) Nullisomy
(c) Monosomy
(d) Haploid
Answer:
(c) Monosomy

Question 52.
Lampbrush chromosomes are seen during:
(a) Mitotic prophase
(b) Meiotic prophase
(c) Mitotic metaphase
(d) Meiotic metaphase
Answer:
(b) Meiotic prophase

Question 53.
Balbiani rings are the structural features of:
(a) Autosomes
(b) Allosomes
(c) Polytene chromosomes
(d) Lamp brush chromosomes
Answer:
(c) Polytene chromosomes

Question 54.
If independent assortment of two genes A & B is lacking in Drosophila. This is due to:
(a) Linkage
(b) Repulsion
(c) Crossing over
(d) Recombination
Answer:
(a) Linkage

Question 55.
Antigens may be large molecules of:
(a) Proteins
(b) Carbohydrates
(c) Lipoproteins
(d) All of the above
Answer:
(d) All of the above

Question 56.
Humoral immune system comprises:
(a) B-lymphocytes
(b) T-lymphocytes
(c) Blood
(d) Monocytes
Answer:
(a) B-lymphocytes

Question 57.
Antibodies in our body produced by:
(a) Monocytes
(b) RBCs
(c) B-Lymphocytes
(d) T-Lymphocytes
Answer:
(c) B-Lymphocytes

Question 58.
Which one is the most numerous and long-acting antibody?
(a) IgA
(b) IgG
(c) IgM
(d) IgE
Answer:
(b) IgG

Question 59.
In colostrum which antibody is present?
(a) IgA
(b) IgG
(c) IgD
(d) IgE
Answer:
(a) IgA

Question 60.
Vaccination against small pox was developed by:
(a) Robert Koch
(b) Louis pasteur
(c) Edward Jenner
(d) Alexander Flemming
Answer:
(c) Edward Jenner

Question 61.
Which one is sexually transmitted disease?
(a) Syphilis
(b) Genital herpes
(c) Trichomoniasis
(d) All of these
Answer:
(d) All of these

Question 62.
BCG (Bacille calmetle guorin) is a vaccine that is used for preventation of:
(a) Polio
(b) Tuberculosis
(c) Tetanus
(d) Leprosy
Answer:
(b) Tuberculosis

Question 63.
Tetanus is a dangerous disease of human which Is caused by:
(a) Clestridium botulinum
(b) Clastridium tetani
(c) Corynebacterium diphtherae
(d) Bordetella pertusis
Answer:
(b) Clastridium tetani

Question 64.
Lung cancer is known as:
(a) Carcinoma
(b) Sarcoma
(c) Melanoma
(d) Glioma
Answer:
(a) Carcinoma

Question 65.
Cerebral malaria is caused bv Plasmodium:
(a) Vivax
(b) Ovale
(c) Malariae
(d) Falciparum
Answer:
(d) Falciparum

Question 66.
Diabetes mellitus is characterized by:
(a) Hypoglycemia
(b) Hyperglycemia
(c) Hypercalcemia
(d) Hypocalcemia
Answer:
(b) Hyperglycemia

Question 67.
Hydrophobia (Rabies) is a disease caused by:
(a) Nematode
(b) Virus
(c) Bacteria
(d) Protozoan
Answer:
(b) Virus

Question 68.
A water borne disease is:
(a) Small pox
(b) Malaria
(c) Tuberculosis
(d) Cholera
Answer:
(d) Cholera

Question 69.
Leprosy is caused by:
(a) Bacillus
(b) Mycobacterium
(c) Vibrio
(d) Salmonella
Answer:
(b) Mycobacterium

Question 70.
Cancer producing genes are:
(a) Tumour genes
(b) Oncogenes
(c) Cancer genes
(d) Regulator genes
Answer:
(b) Oncogenes

Question 71.
Which one of the followings is an opiate nartotic?
(a) Barbiturate
(b) LSD
(c) Moiphine
(d) Amphetamines
Answer:
(c) Moiphine

Question 72.
Sleeping pills are made from:
(a) LSD
(b) Cocaine
(c) Barbiturates
(d) Amphetamines
Answer:
(c) Barbiturates

Question 73.
Cirrhosis is caused by taking:
(a) LSD
(b) Alcohol
(c) Opium
(d) Heroin
Answer:
(b) Alcohol

Question 74.
Anti-Tobacco Day is celebrated on:
(a) May 31
(b) April 22
(c) December 1
(d) June 27
Answer:
(a) May 31

Question 75.
Which of the following are haliucino gens?
(a) Charas
(b) Ganja
(c) Bhang
(d) All of these
Answer:
(d) All of these

Question 76.
Hallucinogens are:
(a)
(b) Marijuana
(c) LSD
(d) All of these
Answer:
(d) All of these

Question 77.
Which part of brain is most affected by alcohol?
(a) Cerebrum
(b) cerebellum
(c) Medulla oblongata
(d) Pens varotii
Answer:
(b) cerebellum

Question 78.
Which one is a synthetic drug?
(a) Opium
(b) LSD
(c) Barbiturates
(d) Cocaine
Answer:
(c) Barbiturates

Question 79.
Sedative may produce a feeling of:
(a) Relaxation
(b) Calmness
(c) Drowsiness
(d) All of these
Answer:
(d) All of these

Question 80.
Restriction endonucleases are widely used in recombinant DNA technology. They are obtained from:
(a) Bacteriophages
(b) Plasmids
(c) Bacterial cells
(d) All prokaryotic cells
Answer:
(c) Bacterial cells

Question 81.
Plasmids are:
(a) c-DNA
(b) Mitochondrial DNA
(c) Circular extrachromosomal DNA in Bacteria
(d) Viral RNA
Answer:
(c) Circular extrachromosomal DNA in Bacteria

Question 82.
Transgenic plants are developed by:
(a) clone and genetically modified genes
(b) Introduction of foreign genes
(c) genetic engineering
(d) Purified genes
Answer:
(b) Introduction of foreign genes

Question 83.
Molecular scissors which cut DNA at specific site is:
(a) Pectinase
(b) Polymerase
(c) Restriction endonuclease
(d) Ligase
Answer:
(c) Restriction endonuclease

Question 84.
There is a restriction endonuclease “ECORI’. What does ‘Co’ part in it stand for?
(a) colon
(b) coelom
(c) coenzyme
(d) coli
Answer:
(d) coli

Question 85.
Which of the following is used in gene cloning?
(a) Nucleoids
(b) Mesosomes
(c) Lomasomes
(d) Plasmids
Answer:
(d) Plasmids

Question 86.
Agarose extracted from seaweeds is used in:
(a) Spectrophotometry
(b) Tissue culture
(c) PCR
(d) Gel electrophoresis
Answer:
(d) Gel electrophoresis

Question 87.
Which one is Palindromic, base sequence in DNA?

Answer:
(d) 5’ GAATTC 3’
3’ CTTAAG 5’

Question 88.
Nucleic acids within the polynucleotide chain is cut by which enzyme?
(a) Endonuclease
(b) Exonuclease
(c) Arysulfatase
(d) Restriction
Answer:
(a) Endonuclease

Question 89.
Restriction enzyme functions as to:
(a) cut the DNA at specific site
(b) Join the cut ends
(c) cut DNA at the ends
(d) cut RNA at specific site
Answer:
(a) cut the DNA at specific site

Question 90.
The cut DNA joined to another cut DNA by which enzyme?
(a) Ligase
(b) Polymerase I
(c) Polymerase II
(d) Helicases
Answer:
(a) Ligase

Question 91.
Bt gene is isolated from:
(a) Bacteria
(b) viruses
(c) Protozoans
(d) Nematodes
Answer:
(a) Bacteria

Question 92.
Bt gene is introduced in cotton plant for protection against:
(a) Protozoans
(b) Nematodes
(c) Insects
(d) Viruses
Answer:
(c) Insects

Question 93.
Which one of the followings is used in industrial preparation of ethanol:
(a) Azotobacter
(b) Lactobacillus
(c) Saccharomyces
(d) Penicillium
Answer:
(c) Saccharomyces

Question 94.
Genetically engineered bacteria are being utilized for production of:
(a) Thyroxine
(b) Cortisol
(c) Human insulin
(d) Epinephrine
Answer:
(c) Human insulin

Question 95.
Antibiotics are mostly obtained from:
(a) Bacteria
(b) Fungi
(c) Viruses
(d) Angiosperms
Answer:
(a) Bacteria

Question 96.
Antibiotics are:
(a) Toxins
(b) Drugs
(c) Syrup
(d) plants
Answer:
(b) Drugs

Question 97.
T-lymphocytes originates from:
(a) Liver
(b) Thymus
(c) Bone marrow
(d) None of these
Answer:
(b) Thymus

Question 98.
Interferons are anti:
(a) viral proteins
(b) Bacterial proteins
(c) Cancer proteins
(d) nucleoproteins
Answer:
(a) viral proteins

Question 99.
Pyramid of energy in a pond ecosystem is always:
(a) Linear
(b) Inverted
(c) Upright
(d) Irregular
Answer:
(c) Upright

Question 100.
Energy transferred from one trophic level to another is:
(a) 5%
(b) 10%
(c) 15%
(d) 20%
Answer:
(b) 10%