Questions
Auxin causes
- growth of apical bud
- growth of lateral bud
- seed dormancy
- fall of leaf
- -
Heterothallism was discovered by
- Blackeslee
- Bessey
- Butler
- A. Flemming
- -
Which of the following algae is parasitic?
- Cephaleuros
- Chlorella
- Anabena
- Spirogyra
- -
A pollutant
- has natural geochemical cycles
- changes homeostasis of an environment
- disturbs natural flora of a place
- becomes stabilised in the ecosystem forever
- -
Which of the following is correct?
- RNA is the genetic material of bacteria
- RNA is the genetic material of all viruses
- DNA is the genetic material of all organisms
- Some viruses have RNA as genetic material
- -
Blood vascular system of an earthworm is
- open type with Hb in RBC
- open type with Hb in plasma
- closed type with Hb in RBC
- closed type with Hb in plasma
- -
Which of the following is correct for bacteria?
- They have both cyclic and non-cyclic photophosphorylation.
- They absorb light > 900 nm of wavelength.
- They release oxygen during photosynthesis.
- They use water during photosynthesis.
- -
Which of the following is incorrect?
- Ovaries mature first in an earthworm.
- Spermatheca is present in segments 6 - 9.
- Male genital aperture is in the 18th segment.
- Earthworms have one pair of ovaries in the 13th segment.
- -
Which of the following is a sex-linked disease?
- Sickle cell anaemia
- Phenylketonuria
- Albinism
- Haemophilia
- -
Aldolase enzyme is present in
- mitochondria
- chloroplast
- lysosomes
- endoplasmic reticulum
- -
In comparison to animals of cold region, large size of pinnae in animals of warm region is due to
- Dollo's law
- Glogger's law
- Cope's law
- Allen's rule
- -
Which of the following trophic levels of food chain have the greatest amount of energy?
- Carnivores
- Herbivores
- Autotrophs
- Omnivores
- -
Male and female cockroaches differ due to the presence or absence of
- anal cerci and anal style
- anal style
- anal setae
- anal cerci
- -
Which of the following chromosomes in a male silkworm is the sex chromosome?
- X
- Y
- XX
- None of the above
- -
Which of the following nerves in a frog is trigeminal?
- 4th
- 5th
- 8th
- 9th
- -
Which of the following disorders is related with thyroid gland?
- Diabetes mellitus
- Hypercalcemia
- Osteoporosis
- Myxedema
- -
Carthamus belongs to the family
- Compositae
- Liliaceae
- Solanaceae
- Graminae
- -
Number of meiosis for formation of 64 zygotes in an angiosperm is 80. In gymnosperms, the number of meiosis for formation of 64 zygotes is
- 40
- 80
- 160
- 20
- -
Which of the following types of cells are absent in sponges?
- Trophocytes
- Myocytes
- Cnidocytes
- Archaeocytes
- -
Maximum number of vascular bundles is present in
- monocot stem
- monocot root
- dicot stem
- dicot root
- -
Modification of an organism to its external environment is an example of
- analogy
- homology
- speciation
- adaptation
- -
Resting membrane potential in a nerve cell is
- -70
- -40
- +70
- +86
- -
Dilation of pupil takes place by
- sympathetic nervous system
- parasympathetic nervous system
- central nervous system
- Both 1 and 2
- -
Which of the following is not related with nitrogen fixation?
- Rhizobium
- Anabena
- Nostoc
- Pseudomonas
- -
Which of the following sets contains only homologus organs?
- Whale's flipper, horse's forelimb and human hand
- Wings of a butterfly, crow and insect
- Horse's forelimb, wing of an insect and human hand
- Vermiform's appendix, body hair and patella
- -
Which of the following pigments is involved in photoperiodic changes in plants?
- Phytochrome
- Cytochrome
- Chlorophyll
- Anthocyanin
- -
Which of the following is incorrect for ancient plants?
- They had photosynthetic pigments.
- They were primitive algae like.
- They used H2S as hydrogen source.
- They released oxygen as byproduct.
- -
C4 pathway for CO2 fixation was elucidated by
- Benson and associates
- Arnon and associates
- Rouhani et al
- Hatch et al
- -
Which of the following is the correct pair of pathogen and its vector?
- Plasmodium and Anopheles
- Plasmodium and Culex
- Virus and Anopheles
- Protozoan and Aedes
- -
Diameter of DNA is constant due to
- hydrogen bonds between base
- phosphodiester bonds
- disulphide bonds
- covalnet bonds
- -
Lateral roots arise from
- pericycle
- cortex
- endodermis
- stele
- -
On selfing, RrTt produced 400 plants. Find out the number of plants with genotype RrTt?
- 100
- 225
- 50
- 300
- -
Liver and pancreas are derivatives of
- ectoderm
- endoderm
- ectoderm and mesoderm
- ectoderm and endoderm
- -
A circulatory system which is formed by capillaries and ends with capillaries is
- renal
- hepatic
- double circulatory system
- hypophyseal
- `-
Caryopsis is a fruit in which seed coat and fruit wall is fused. It is present in
- wheat
- tomato
- sunflower
- mango
- -
Which of the following is correct about saprophytic angiosperms?
- They secrete enzymes outside the body.
- They have mycorrhiza with fungi.
- They take food and digest it.
- They are photosynthetic.
- -
Catalytic converter in vehicles is used for controlling
- air pollution
- water pollution
- radioactive pollution
- soil pollution
- -
Term inominate is related with
- nerve
- artery
- skeleton and artery
- None of these
- -
Lacteals help in
- absorption of fat
- absorption of carbohydrate
- absorption of proteins
- All of the above
- -
Third moulting in Ascaris larva takes place in the
- lung
- liver
- heart
- intestine
- -
Submerged hydrophytes show
- stomata
- abundant air sacs
- developed mechanical tissue
- secondary growth
- -
Which of the following was absent in primitive environment during origin of life?
- O2
- CH4
- H2O
- H2
- -
Which of the following is a wastage process?
- Respiration
- Photosynthesis
- Photorespiration
- Movement
- -
In human beings, the waste products of nucleotide metabolism are excreted as
- ammonia
- urea
- uric acid
- amino acid
- -
Quinine is used for treatment of malarial fever. It is extracted from
- Atropa belladona
- Chincona officinalis
- Aconitum napellus
- Rouwolffia serpentina
- -
Which of the following is a sex influenced disease?
- Baldness in males
- Haemophillia
- Xeroderma pigmentosa
- Down's syndrome
- --
Undifferentiated totipotent cells of sponges are
- archeaocytes
- porocytes
- trophocytes
- myocytes
- -
Genetic diversity is related to
- gene based diversity
- types of communities in an area
- diversity and evolution of species with a genus
- types of species within a community
- -
Sigmoid notch is present in
- femur
- radius ulna
- tibia fibula
- humerus
- -
Who proved that plants absorb CO2 and release O2?
- Mayer
- Van Neil
- Priestley
- Ingenhousz
- -
Enveloped virus enters the host cell by
- injecting its own nucleic acid inside host cell
- contact with cell receptor and endocytosis
- phagocytosis
- the fusion of plasma membrane with host
- -
Largest muscle in the human body is
- sartorius
- gluteus
- stapedius
- masseter
- -
Addition of which of the following elements in water speeds up the metamorphogenesis in frog tadpole larva?
- Iodine
- Potassium
- Sodium
- Chlorine
- -
Adrenaline and noradrenaline are hormones and act as
- energy producing agents
- food storage products
- neurotransmitters
- energy storing substances
- -
A vascular bundle without pith is
- protostele
- siphonostele
- solenostele
- None of these
- -
Restriction endonuclease cuts
- one strand of DNA at a specific site
- both strands of DNA
- both strands of DNA at any site
- a single strand of RNA
- -
Cell membrane
- controls exocytosis
- controls endocytosis
- controls both endocytosis and exocytosis
- does not control movement of substances
- -
Synthesis of urea occurs in
- kidney
- gall bladder
- liver
- urinary bladder
- --
Amphimixis is
- fusion of sperm with egg
- fusion of pronucleus of sperm with egg
- not a kind of fusion
- fusion of diploid cells
- -
Zygotic meiosis occurs in
- Chlamydomonas
- Bryophyte
- Pinus
- Dryopteris
- -
Which of the following had the maximum cranial capacity?
- Neanderthal man
- Cro-Magnon man
- Modern man
- Java man
- -
The last electron acceptor during ETS is
- O2
- cytochrome a3
- cytochrome a
- cytochrome a2
- -
What is the difference between amoeba and entamoeba?
- Contractile vacuoles are absent in entamoeba
- Contractile vacuoles are absent in amoeba
- Food vacuoles are present in amoeba only
- None of the above
- -
Crypts of Lieberkuhn are present in
- small intestine
- liver
- colon
- stomach
- -
What is the difference between smooth and rough endoplasmic reticulum?
- Rough endoplasmic reticulum has ribosomes
- Smooth endoplasmic reticulum has ribosomes
- Smooth endoplasmic reticulum takes part in protein synthesis
- Both have F1 particles
- -
Maximum percentage of which of the following minerals is present in plant ash?
- Mg
- Zn
- Ca
- K
- -
A lipoprotein covering is absent in which of the following cell organelles?
- Ribosomes
- Peroxisomes
- Mitochodria
- Lyosomes
- -
Pneumatophores are present in
- mangroves
- hydrophytes
- xerophytes
- lithophytes
- -
Bidder's canal is present in
- male rabbit
- male frog
- female frog
- female rabbit
- -
Bile salts help in
- digestion of fats
- digestion and absorption of fats
- digestion of proteins
- digestion of proteins and fats
- -
Development of pentadactylous nature in vertebrates is an example of
- adaptation
- convergent
- convergent and adaptive radiation
- divergent and adaptive radiation
- --
Renal portal system is
- present in all vertebrates
- present in all chordates
- absent in mammals
- present in mammals
- -
Ovules of gymnosperms are
- bitegmic
- unitegmic
- naked
- Both 2 and 3
- -
Amoeba was discovered by
- Russel von Rosenhoff
- Hyman
- Lyman and Losch
- Goldacre and Lorhe
- -
In photosynthesis, NADPH2 is formed. In respiration, it forms during
- HMP
- ETC
- Krebs cycle
- None of these
- -
Which of the following is not a reflex reaction?
- Salivation
- Opening and closing of eyes
- Response of pinching a pin in a frog leg
- Sweating
- -
Theory of natural selection was given by
- Lamarck
- Darwin
- Weisman
- Wallace
- -
Succus entericus is a/an
- intestinal juice
- gastric juice
- bile juice
- salivary juice
- -
Which of the following is/are an exhaustible and limited source of energy?
- Nuclear fuels
- Water energy
- Solar energy
- Fossil fuels
- -
Cytochrome c oxidase contains
- Fe
- Mg
- Zn
- Cu
- -
The Koyoto Protocol is related to
- ozone layer depletion
- green house effect
- water pollution
- conservation of wild life
- -
Which of the following is the most diverse organism of the ecosystem?
- Producer
- Consumer
- Decomposer
- Carnivore
- -
In gynandromorphs
- some cells of the body contain XX and some cells contain the genotype XY
- all cells are of the genotype XY
- all cells are of the genotype XX
- all cells are of the genotype XXY
- -
Photosynthetic products are translocated in the form of
- glucose
- sucrose
- maltose
- starch
- -
Which of the following is correct about arteries?
- They are thick walled and blood flows at high pressure
- They are thin walled and blood flows at low pressure
- They are thick walled and blood flows at low pressure
- None of the above
- -
Spore of funaria on germination gives rise to
- protonema
- sporophyte
- prothallus
- capsule
- -
Which of the following is the most advanced fruit?
- Cypsela
- Caryopsis
- Pome
- Etaerio of drupe
- -
Ulothrix release zoospores during
- evening
- morning
- night
- noon
- -
The larger nucleus in a pollen grain is
- tube nucleus
- sperm nucleus
- generative nucleus
- None of these
- -
Which of the following is absent in a leaf?
- Lenticel
- Stoma
- Chlorophyll
- Mesophyll
- -
Steroid hormones work as
- they enter into target cells and bind with specific receptor and activate specific genes to form proteins
- they bind to cell membrane
- they catalyse formation of c AMP
- None of the above
- -
Presence of persistent calyx is the feature of family
- Solanaceae
- Graminae
- Malvaceae
- Compositae
- -
In a double stranded DNA, the sequence of base pairs in one strand is AGCTAAAGC. What is the sequence of its complementary strand?
- TCGATTTCG
- ACGAUUCG
- AGCTAAGC
- CAUTAUCG
- -
Roots of plants absorb which of the following from the soil?
- Capillary water
- Chemically bound water
- Gravitational water
- Hygroscopic water
- -
What is the net gain of ATP during glycolysis?
- 2
- 4
- 8
- 10
- -
Which of the following is correct about experiment conducted by Mendel?
- It worked on garden pea
- Law of segregation was proved by monohybrid cross
- He discovered linkage
- All of the above
- -
Which of the following is the vascular bundle in which two patches of phloem are present on both sides of xylem?
- Collateral
- Bicollateral
- Concentric
- Radial
- -
Raphides are crystals of
- calcium carbonate
- calcium oxalate
- magnesium carbonate
- magnesium oxalate
- -
Gene regulation in bacteria was shown by
- Jacob and Monad
- Beadle and Tautum
- Temin and Baltimore
- Kornberg
- -
The term 'new systematic' was given by
- Julian Huxley
- Bateson
- Linnaeus
- Darwin
- -