Que- Which statement is incorrect?
a. Climacteric is burst of respiratory activity in fruit ripening
b. It is associated with ethane production
c. It helps in fruit set
d. It helps in fruit ripening
Answer- It helps in fruit set
Que- What is critical in photoperiodism?
a. Length of light period
b. Length of dark period
c. Both a and b
d. None of these
Answer- Length of dark period
Que- Which one is not a day neutral plant?
a. Cucumber
b. Maize
c. Cotton
d. Tobacco
Answer- Tobacco
Que- Which statement is incorrect?
a. In short day plants red light prevents flowering
b. Henbane is a short day plant
c. In long day plants for red light promotes flowering
d. Leaf unrolling occurs in grasses
Answer- Henbane is a short day plant
Que- In biennials and perennials, low temperature stimulus is not received by
a. Shoot apex of mature stem
b. Embryo of the seed
c. Leaves of the plants
d. None of the above
Answer- Leaves of the plants
Que- Development of an egg into zygote without fertilization is called
a. Parthenogenesis
b. Apomixes
c. Parthenocarpy
d. None of these
Answer- Parthenogenesis
Que- In which organism males are haploid
a. Aphids
b. Honey bee
c. Mosquito
d. Butterfly
Answer- Honey bee
Que- In cloning, nucleus is introduced into
a. Somatic cell
b. Egg cell
c. Sperm cell
d. None of these
Answer- Egg cell
Que- Which characteristic is not of identical twins?
a. Produced by separation of two blastomeres
b. Have different genetic makeup
c. Produced asexually
d. Produced when embryo is at two cell stage
Answer- Have different genetic makeup
Que- Viviparous animals are those in which
a. Internal fertilization with external development in eggs
b. Internal fertilization with internal development inside female body
c. Internal fertilization and internal development followed by hatching of egg
d. External fertilization with external development
Answer- Internal fertilization with internal development inside female body
Que- Example of ovoviviparous
a. Reptiles
b. Mammals
c. Duckbill platypus
d. Frog
Answer- Duckbill platypus
Que- Sertoli cells
a. Provide liquid medium to cells in testes
b. Provide protection and nourishment to cells
c. Secrete testosterone
d. Both a and b
Answer- Both a and b
Que- 2nd meiotic division in oocyte is completed
a. When ovum is discharged from the ovary
b. When oocyte is fertilized by sperm
c. Just before fertilization
d. Before the onset of menstruation
Answer- When oocyte is fertilized by sperm
Que- Fertilization of ovum occurs
a. In proximal part of oviduct
b. In distal part of oviduct
c. In uterus
d. In ovary
Answer- In proximal part of oviduct
Que- Duration of menstrual cycle is
a. 25 days
b. 26 days
c. 27 days
d. 28 days
Answer- 28 days
Que- Progesterone is secreted by
a. Ripening follicles
b. Uterine epithelium
c. Corpus luteum
d. Fertilized egg
Answer- Corpus luteum
Que- Total gestation period is about
a. 350 days
b. 200 days
c. 280 days
d. 320 days
Answer- 280 days
Que- Fetus is human embryo from the beginning of
a. 2nd month
b. 3rd month
c. 4th month
d. 5th month
Answer- 3rd month
Que- Average loss of blood during birth is about
a. 250 cm3
b. 350 cm3
c. 450 cm3
d. 150 cm3
Answer- 350 cm3
Que- Which statement is incorrect?
a. Syphilis is caused by Treponema pallidum
b. Genital herpes produces genital soreness and ulcers
c. Syphilis affects eyes, bones, joints, CNS
d. Gonorrhea is caused by gram negative bacterium
Answer- Gonorrhea is caused by gram negative bacterium
Que- The animals in which there are separate male and female individuals are called
a. Unisexual
b. Bisexual
c. Hermaphrodite
d. None of these
Answer- Unisexual
Que- In which of the following animals, placenta is formed?
a. Prototherians
b. Metatherians
c. Eutherians
d. None of these
Answer- Eutherians
Que- Which of these cycles operate in human females?
a. Oestrous cycle
b. Menstrual cycle
c. Both of these
d. None of these
Answer- Menstrual cycle
Que- During birth which of following act as birth canal?
a. Oviduct
b. Uterine tube
c. Uterus
d. Vagina
Answer- Vagina
Que- Nutrition to egg in ovary is provided by
a. Germ cells
b. Follicle cells
c. Milk cells
d. None of these
Answer- Follicle cells
Que- End of menstrual cycle in old age is called
a. Andropause
b. Menopause
c. Gametopause
d. All of these
Answer- Menopause
Que- In asexual reproduction offspring are genetically
a. Identical to the parents
b. Non identical to the parents
c. Identical if mutations do not occur.
d. Both a and c
Answer- Both a and c
Que- Evolution of pollen tube is parallel to the evolution of
a. Leaf
b. Plant
c. Flower
d. Seed
Answer- Seed
Que- Resumption of normal growth by a dormant embryo is called
a. Seed dormancy
b. Germination
c. Fruit set
d. Fruit ripening
Answer- Germination
Que- ________ is a quiescent form of phytochrome.
a. P630
b. P660
c. P730
d. P760
Answer- P660
Que- Apomixis is a form of
a. Parthenocarpy
b. Vernalization
c. Parthenogenesis
d. None of these
Answer- Parthenogenesis
Que- Growth process is
a. Irreversible
b. Reversible
c. Sometimes reversible sometimes irreversible
d. Temporary
Answer- Irreversible
Que- A plant has a growth pattern called
a. Closed growth
b. Open growth
c. In between the two
d. None of these
Answer- Open growth
Que- Speed of growth is
a. Rapid throughout
b. Slow throughout
c. First slow then rapid then slow again
d. First rapid then slow
Answer- First rapid then slow
Que- Meristems are group of cells that
a. Allow the surrounding region to divide
b. Provide nutrition
c. Help in movement
d. Retain the potential to divide
Answer- Retain the potential to divide
Que- Higher plants grow through
a. Growing points
b. Whole plant body is capable of growing
c. Only roots grow
d. None of these
Answer- Growing points
Que- Meristems are of
a. Two types
b. Three types
c. Four types
d. Five types
Answer- Three types
Que- Apical meristems are located at
a. Tips of leaves
b. Tips of flowers
c. Tips of roots and stems
d. Tips of roots only
Answer- Tips of roots and stems
Que- Function of intercalary meristems is
a. Increase in length
b. Increase in diameter
c. Production of leaves and flowers
d. None of these
Answer- Production of leaves and flowers
Que- Lateral meristems are present in
a. All plants
b. Gymnosperms and dicots
c. Monocots
d. In aquatic plants only
Answer- Gymnosperms and dicots
Que- Intercalary meristems are of
a. Permanent nature
b. Temporary nature
c. Some are permanent some temporary
d. None of these
Answer- Temporary nature
Que- Determinate growth is
a. Growing continuously
b. Fluctuating growth
c. Grow to certain size and then stop
d. Vegetative roots and shoots grow by
Answer- Vegetative roots and shoots grow by
Que- Vegetative roots and shoots grow by
a. Determinate growth
b. Primary growth only
c. Indeterminate growth
d. None of these
Answer- None of these
Que- In plants growth is of
a. Four types
b. Five types
c. One type
d. Two types
Answer- Two types
Que- Secondary growth is actually
a. Extension of plant body
b. Increase in thickness
c. Production of leaves and flowers
d. None of these
Answer- Increase in thickness
Que- Cambium are examples of
a. Apical meristems
b. Intercalary meristems
c. Lateral meristems
d. None of these
Answer- Lateral meristems
Que- Growth of multicellular plants occur in
a. Two phases
b. Three phases
c. Five phases
d. Four phases
Answer- Four phases
Que- In multicellular plants cell division occur by
a. Binary fission
b. Conjugation
c. Meiosis
d. Mitosis
Answer- Mitosis
Que- Cells elongate by
a. Mitosis
b. Uptake of water
c. Stretching
d. Formation of cell wall
Answer- Uptake of water
Que- Plasticity of cell wall increases during
a. Cell maturation
b. Cell elongation
c. Cell differentiation
d. Cell division
Answer- Cell elongation
Que- Cells of fibers and tracheids elongate during
a. Phase of cell division
b. Phase of cell elongation
c. Phase of cell maturation
d. Phase of cell differentiation
Answer- Phase of cell division
Que- During cell differentiation
a. Walls of cells become thick
b. Walls of cells become pitted
c. Both of these
d. None of these
Answer- Both of these
Que- Maximum optimum temperature for growth of plants is
a. 30-40 degree C
b. 25-30 degree C
c. 10-20 degree C
d. 20-40 degree C
Answer- 25-30 degree C
Que- Which one is incorrect
a. Red light favours elongation of cells
b. Blue light retards cell enlargement
c. UV rays retards cell elongation
d. UV rays retard cell division
Answer- UV rays retard cell division
Que- Light duration plays a role in inducing or suppressing flowering, phenomenon is called
a. Photosynthesis
b. Photoperiodism
c. Phototropism
d. Photogenetics
Answer- Photoperiodism
Que- Root primordial develop from
a. Apical meristems
b. Intercalary meristems
c. Pericycle
d. Epidermis
Answer- Pericycle
Que- Growth of apical buds suppressing lower axillary buds is
a. Lateral dominance
b. Compensatory dominance
c. Apical dominance
d. Both a and b
Answer- Apical dominance
Que- In chicks fertilization is
a. Internal
b. External
c. Both a and b
d. None of these
Answer- Internal
Que- Incubation temperature for chick is
a. 20-30 degree C
b. 40-45 degree C
c. 36-38 degree C
d. 25-35 degree C
Answer- 36-38 degree C
Que- After providing 36-38 degree C temperature, chick's egg is hatched on
a. 20th days
b. 25th days
c. 23rd days
d. 21st days
Answer- 21st days
Que- Which one is incorrect?
a. Epiblast is presumptive ectoderm and mesoderm
b. Hypoblast is presumptive endoderm
c. Hypoblast is presumptive mesoderm
d. Upper layer of cells in blastoderm is epiblast
Answer- Hypoblast is presumptive mesoderm
Que- Peripheral part of blastoderm making contact with yolk is called
a. Area pellucida
b. Area opaca
c. Blastocoel
d. Area plana
Answer- Area opaca
Que- Cavity formed between somatic and splanchnic mesoderm is called
a. Gastrocoele
b. Blastocoele
c. Coelom
d. Neurocoele
Answer- Coelom
Que- Mechanism of development was explained by
a. Hans Dietrisch
b. Spemann
c. Both a and b
d. Haemmerling
Answer- Both a and b
Que- Which statement is correct about gray crescent?
a. A pigmented area that appears at time of fertilization
b. A pigment free area that disappears at the time of fertilization
c. A hyperpigmented area that is present in the embryo
d. A pigment free area that appears at time of fertilization
Answer- A pigment free area that appears at time of fertilization
Que- Which statement is incorrect?
a. Fertilized egg of an ascidian contains cytoplasm of four colours
b. Yellow cytoplasm gives rise to gut
c. Grey equatorial cytoplasm gives rise to notochord.
d. Grey vegetal cytoplasm gives rise to gut
Answer- Yellow cytoplasm gives rise to gut
Que- Acetabularia crenulata has
a. Irregular shaped cap
b. Regular shaped cap
c. Irregular while young and regular while adult
d. No cap
Answer- Irregular shaped cap
Que- Which statement is correct?
a. Ectodermal cells have effect on mesodermal cells to induce differentiation
b. Mesodermal cells stimulate ectodermal cells to form nervous system
c. Endodermal cells stimulate ectodermal cells
d. All are correct
Answer- Mesodermal cells stimulate ectodermal cells to form nervous system
Que- Negative physiological changes in our body is called
a. Teratology
b. Aging
c. Regeneration
d. Embryonic induction
Answer- Aging
Que- Study of aging is
a. Teratology
b. Embryology
c. Gerontology
d. Pathology
Answer- Gerontology
Que- The ability to regain or recover the lost or injured part of body is
a. Aging
b. Regeneration
c. Abnormal development
d. Primary induction
Answer- Regeneration
Que- Among invertebrates who possess great power of regeneration
a. Arthropods
b. Molluscs
c. Sponges
d. Nematodes
Answer- Sponges
Que- Which statement is incorrect?
a. Earthworm can regenerate its head
b. Salamander can regenerate its limbs
c. Lizard can regenerate its head
d. Man can regenerate his skin
Answer- Lizard can regenerate its head
Que- Growth is basically an increase in
a. Nuber of cells
b. Size of cells
c. Both of these
d. None of these
Answer- Both of these
Que- The stage of rapid cell division just after fertilization is
a. Organogenesis
b. Cleavage
c. Gastrulation
d. Growth
Answer- Cleavage
Que- The German scientist Spemann worked on differentiation in
a. 1924.0
b. 1929.0
c. 1915.0
d. 1940.0
Answer- 1924.0
Que- Inducer substances are produced by
a. Notochord
b. Somite
c. Archenteron
d. Coelom
Answer- Notochord
Que- What is the feature of cells in gastrulation?
a. Division
b. Migration
c. Differentiation
d. All of these
Answer- Migration
Que- Vertebral column is formed from
a. Ectoderm
b. Endoderm
c. Mesoderm
d. None of these
Answer- Mesoderm
Que- Liver and pancreas arise from
a. Foregut
b. Midgut
c. Hindgut
d. None of these
Answer- Foregut
Que- Hemophilia is
a. Excessive bleeding due to defective gene on sex chromosome
b. Due to extra sex chromosome
c. Due to structural deviation during organogenesis
d. Due to nutritional deficiencies
Answer- Excessive bleeding due to defective gene on sex chromosome
Que- Which is incorrect?
a. Chromosomes 1st observed by walther Fleming
b. Chromosomal theory of inheritance 1st formulated by Walter Sutton
c. 1st evidence of hereditary nature of DNA provided by Friedrich Meischer
d. Sex chromosomes discovered by Thomas Hunt Morgan
Answer- 1st evidence of hereditary nature of DNA provided by Friedrich Meischer
Que- Chromosome is made of
a. 2 chromatids +1 centromere +secondary constriction
b. 1 chromated + 1 centromere + primary constriction
c. 2 chromatids + 1 centromere + primary constriction
d. 2 chromatids + 2 centromere + secondary constriction
Answer- 2 chromatids +1 centromere +secondary constriction
Que- Chromosomes are composed of
a. 40% protein and 60% DNA
b. 50% protein and 50% DNA
c. 70% protein and 30% DNA
d. 60% protein and 40% DNA
Answer- 60% protein and 40% DNA
Que- A typical human chromosome contains _________ nucleotides in its DNA
a. 240 million
b. 140 million
c. 150 million
d. 160 million
Answer- 140 million
Que- Histones have abundance of amino acids
a. Valine and lysine
b. Arginine and lysine
c. Valine and arginine
d. Histidione and threonine
Answer- Arginine and lysine
Que- A tortion of chromatin that is condensed only during cell division is
a. Euchromatin
b. Heterochromatin
c. Biochromatin
d. Nucleochromatin
Answer- Euchromatin
Que- Transfer of genetic material from one cell to another that can alter the genetic makeup of recipient cell is called
a. Mutation
b. Transuction
c. Replication
d. Variation
Answer- Transuction
Que- DNA contains
a. Purines (A and G) pyrimidines (U and (c)
b. Purines (T and (c) pyrimidines (A and G)
c. Purines (A and (c) pyrimidines (U and G)
d. Purines (A and G) pyrimidines (T and (c)
Answer- Purines (A and G) pyrimidines (T and (c)
Que- In DNA
a. A forms two bonds with T
b. G forms three bonds with C
c. A forms three bonds with T
d. Both a and b
Answer- Both a and b
Que- DNA has a helical shape with the diameter of
a. 3 nm
b. 4 nm
c. 2 nm
d. 5 nm
Answer- 2 nm
Que- In semi-conservative replication
a. Sequence of original duplex is conserved after one round of replication
b. Gererate DNA copies of entirely new molecules
c. Parental DNA become completely dispersed
d. Each strand of daughter molecules will be a mixture of old and new
Answer- Sequence of original duplex is conserved after one round of replication
Que- The true E.Coli replicating enzyme is
a. DNA polymerase I
b. DNA polymerase II
c. DNA polymerase III
d. All of these
Answer- DNA polymerase III
Que- Rate of DNA replication by DNA polymerase is
a. 2000 nucleotides / sec
b. 1000 nucleotides / sec
c. 150 nucleotides / sec
d. 1050 nucleotides / sec
Answer- 1000 nucleotides / sec
Que- Which statement is correct?
a. Leading strand elongates away from the replication fork
b. Lagging strand elongates towards the replication fork
c. Lagging strand is constructed discontinuously.
d. Both a and b
Answer- Lagging strand is constructed discontinuously.
Que- The length of okazaki fragments in eukayotes is
a. 150--250 nucleotides long
b. 200-300 nucleotides
c. 1000-2000 nucleotdes
d. 100-200 nucleotides
Answer- 100-200 nucleotides
Que- In alkaptonuria
a. Patient's urine contains homogenetisic acid
b. Urine becomes black
c. Both a and b
d. Urine contains phenylalanine.
Answer- Both a and b
Que- The sequence of nucleotides that determines the amino acid sequence of a protein is
a. Chromosome
b. DNA
c. RNA
d. Gene
Answer- Gene
Que- Central dogma is
a. Transfer of information from DNA to mRNA
b. Basic mechanism of reading and expressing genes
c. Transfer of information from RNA to proteins
d. Synthesis of all three types of RNA
Answer- Basic mechanism of reading and expressing genes
Que- In prokaryotes there are
a. Three types of DNA polymerases
b. One type of RNA polymerase
c. Three types of RNA polymerase
d. Both a and b
Answer- Both a and b