A. Repetitive DNA
B. Segment forming sn RNA
C. Segment forming sc RNA
D. Both B and C
# Beet roots are colored due to the presence of:
A. Anthocyanin in cytoplasm
B. Anthocyanin in vacuole
C. Anthocyanin in chloroplast
D. Carotenoids of chromoplasts
# The smallest pathogens are:
A. Bacteria
B. Virus
C. Viroids
D. Prions
# ATP formation during photosynthesis is:
A. Phosphorylation
B. Photophosphorylation
C. Oxidative phosphorylation
D. None of the above
# Cells programmed to die during growth and differentiation are:
A. WBCs
B. Bone cells
C. Oxidative phosphorylation
D. Tracheary elements
# Retrovirus and reverse transcriptase were discovered by:
A. Sinsheimer
B. Stenley
C. Temin and Baltimore
D. Hershey and Chase
# Lysosomes are called suicidal bags because they have:
A. Hydrolytic enzymes
B. Parasitic activity
C. Food vacuole
D. Catabolic enzyme
# Mammalian brain differs from amphibian brain in having:
A. Olfactory lobe
B. Corpus callosum
C. Cerebellum
D. Hypothalamus
# In which of the following, columella is present in sporangium?
A. yeast
B. spirogyra
C. ulothrix
D. Rhizopus
# Which of the following microscopes can be used for studying unstained and dividing cells?
A. Electron microscope
B. Phase contrast microscope
C. Polarizing microscope
D. All of the above
# The animal in which sexes can be differentiated from external morphology is:
A. Taenia
B. Krait
C. Ascaris
D. Sea anemone
# Organism which are indicator of SO2 pollution in air, are:
A. Mosses
B. Lichens
C. Mushrooms
D. Puffballs
# Neotype is:
A. Nomenclatural type from original material
B. Nomenclatural type when original is missing
C. One of the two or more specimens cited by the author
D. New species discovered by scientists
# Sporozoans have locomotor organs:
A. Pseudopodia
B. Cilia
C. Flagella
D. None of the above
# Microvilli are:
A. Outfolds of cell membrane
B. Infold of cell membrane
C. Both a and b
D. Submembrane vacuoles
# In the seeds of gymnosperm, the gametophytic generation is represented by:
A. Perisperm
B. Testa
C. Embryo
D. Endosperm
# Triple antigen or DPT is:
A. Vaccine against dengue, Polio and Typhoid
B. Vaccine against diphtheria, Polio and Typhoid
C. Mixture of viruses causing diphtheria, Polio and tetanus
D. Vaccine against diphtheria, whooping cough and tetanus
# During cell cycle, two molecules of DNA are present in chromosome during:
A. G1 phase
B. Beginning of S phase
C. G2 phase
D. End of M phase
# Flow of energy declines as it passes from lower to higher trophic level. This is explained by:
A. First law of Thermodynamics
B. Second law of Thermodynamics
C. Newton's 2nd law
D. Newton's 3rd Law
# Which of the following crosses would produce a genotype ratio of 1:2:1 in F2?
A. AB*AB
B. Ab*ab
C. Ab*Ab
D. ab*ab
# Monocarpellary pistil with unilocular and marginal placentation are found in:
A. Compositae
B. Leguminosae
C. Brassicaceae
D. Solannaceae
# Kupffer's cells occur in:
A. Spleen
B. Kidney
C. Brain
D. Liver
# The cation necessary for coagulation of blood is:
A. Na
B. K
C. Ca
D. Cl
# Down's syndrome is due to:
A. Extra sex chromosome
B. Extra 21st chromosome
C. Extra Y chromosome
D. Deficient sex chromosome
# A good vector in genetic engineering is:
A. Agrobacterium tumefaciens
B. Bacillus thringiensis
C. Bacillus amylaliquifaciens
D. Salmonella typhimurium
# Most primitive organisms are:
A. Monerans
B. Protists
C. Fungi
D. Algae
# Amphiblastula is larvae of:
A. Leucosolenia
B. Sycon
C. Hydra
D. Planaria
# Which group contains fiber yielding plants of economic importance?
A. Gossypium, Crotolaria and Hibiscus
B. Gossypium, Agave and Cassia
C. Gossypium, Cassia and Lycopersicum
D. Gossypiumm, Brassica and Nicotiana
# Poison glands of snakes are modified:
A. Linguals
B. Sublinguals
C. Maxillaries
D. Parotids
# Hypodermis in monocotyledenous stem is:
A. Parenchymatous
B. Chlorenchymatous
C. Collenchymatous
D. Sclerenchymatous
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