Sample Paper Bihar Board Class XII Biology

(Set-1)

1. GM Plants are useful in
(A) increasing crop yield
(B) producing disease resistant plants
(C) increasing drought resistant plants
(D) all of these

2. The theory of Origin of Species by natural selection was proposed by—
(A) Charles Darwin
(B) Lamarck
(C) Ernst Hacckel
(D) Malthu

3.An enzyme used to cut DNA—
(A) Pectinase
(B) Ligase
(C) Restriction endonuclease
(D) Lysozyme

4.What is the position of a tiger in a food cha in shown below ?
(Grass → Deer → Tiger)
(A)Producer
(B) Primary Consumer
(C)Secondary Consumer
(D) Decomposer

5.Replcation of DNA needs
(A)DNA Ligase
(B) DNA Ploymerase
(C) DNA Polymerase and DNA Ligase
(D)Translocase and RNA Polymerase

6.Dudhwa National Park is situated in
(A) Assam
(B) U. P.
(C) Gujarat
(D) West Bengal

7.Seeds of fruits are transformed
(A) Corolla
(B) style
(C) wall of avary
(D) ovule

Sample Paper Bihar Board Class XII Biology

(Set-2)

1. Group of bacteria used in biogas production is
(A) Eubacteria
(B) Organotroph
(C) Methanotroph
(D) Methanogen

2.Baker's yeast is
(A) S. Cerevisae
(B) S. Ludwingi
(C) S. Octosporus
(D) Shizo saaharomyces

3.Ornithophily is pollination by
(A) Man
(B) Wind
(C) Birds
(D) Bats

4.When breeding is between animals of the same breed it is called
(A) Inbreeding
(B) Out breeding
(C) Out crossing
(D) Cross breeding

5.Anthesis is a phenomenon which refers to
(A) growth of pollen tube inside ovary
(B) Formation of Pollen
(C) Opening of flower bud
(D) Development of anther

6.PCR method is useful for
(A) DNA synthesis
(B) DNA amplification
(C) Protein synthesis
(D) Amino acid synthesis

Sample Paper Bihar Board Class XII Biology

(Set-3)

1.Which one of the following is a sexually transmitted disease?
(A) Typhoid
(B) Syphilis
(C) Colera
(D) Maleria

2.Following is the basal part of ovule
(A) Chalaza
(B) Hilum
(C) Nucellus
(D) None

3.The chromosome number is Doun's Syndrome is
(A) 48
(B) 47
(C) 49
(D) 46

4.Spermatid transforms into following number of sperms—
(A) 2
(B) 3
(C) 4
(D) 5

5.Pyrimidine is
(A) Adenine
(B) Guanine
(C) Uracil
(D) All

6.The initiation codon in Translation process is
(A) GUA
(B) AUG
(C) UGA
(D) All

7.Mycorrhiza is the example of
(A) Mutualism
(B) Commensalisms
(C) Parasitism
(D) All

8. The flippears of penguin and dolphin show
(A) homology
(B) Analogy
(C) both
(D) None

Sample Paper Bihar Board Class XII Biology

(Set-4)

1. Perisperm is the remained portion of —
(A) Nuclleus
(B) Embryo
(C) Endosperm
(D) Integument

2. Which one of the following would represents allotrioploid —
(A) AAABB
(B) AAAA
(C) AABB
(D) BBBB

3.In which of following fertilization is internal—
(A) Fish
(B) Amphibians
(C) Major of algae
(D) Angiosperm

4.What is the main contribution of Neo-Darwinians to theory of Darwinism ?
(A) Photorespiration
(B) Respiration
(C) Photosynthesis
(D) Leaf anatomy

5.In pond/forest ecosystem pyramid of energy is
(A) Always upright
(B) always inverted
(C) Both upright & inverted
(D) shaped

6.The main difference between gram positive (+) and gram negative (–) bacteria lies in
(A) Pili
(B) Cell Wall
(C) Flagella
(D) Plasmidis

7.Lampbrush chromosomes found in the oocytes of amphibians are seen in —
(A) Leptotene
(B) Diplotene
(C) Pachytene
(D) None

Sample Paper Bihar Board Class XII Biology

(Set-5)

1.The genotypic ratio in monohybrid cross is
(A) 3 : 1
(B) 9 : 3 : 3 : 1
(C) 1 : 2 : 1
(D) None

2. Malaria is caused due to
(A) Protoza
(B) Algae
(C) Fungi
(D) Malnutrition

3.Which one of the following has largest population in a food-chain
(A) Producer
(B) Primary Consumer
(C) Secondary consumer
(D) Decomposer

4.According to mendalism which characters are dominant :
(A) Tall plant, wrinked seed
(B) Tall plant, round seed
(C) Dwarf plant, wrinkled seed
(D) Dwarf plant, round seed

5.Amoebiasis is caused due to
(A) Entamoeba histolitica
(B) Plasmodium
(C) Streptococcus
(D) Wuchareia bancrofti

6.Home sapiens arose in
(A) Africa
(B) Asia
(C) Europe
(D) Australia