BPKIHS Dharan 2000 Biology MCQs

# The inflorescence in coconut is:
A. Spadix
B. Capitulum
C. Spikelet
D. Umbel

# In some grasses, C4 pathway occurs. It is:
A. Additive
B. Accumulative
C. Cumulative
D. Alternative


# Xerophytic plants maintain water level constant by:
A. Absorbing water
B. Balancing salt concentration
C. Accumulating water
D. Absorbing water vapor from air

# Food mobilization in germinating seed is due to:
A. Auxin
B. Gibberellin
C. Cytokinin
D. Ethylene

# Rate of transpiration is affected by humidity in:
A. Land plants only
B. Water plants only
C. Both
D. None

# A plant looks green and healthy due to:
A. Mg
B. Fe
C. N
D. Mg and Fe

# Coenzyme in vitamin works:
A. As an enzyme
B. Independent of apoenzyme
C. Dependent of apoenzyme
D. None

# Identical twins are produced by fertilization of:
A. 1 ovum by 1 sperm
B. 2 ova by 1 sperm
C. 1 ovum by 2 sperms
D. 2 ova by 2 sperms

# Metabolic event takinng place in cell is:
A. DNA to RNA to DNA
B. DNA to RNA to Protein
C. DNA to Protein to RNA
D. RNA to Protein to DNA

# Interphase, chromatin under electron microscope refers to:
A. Thin thread
B. Colloidal masses
C. Dark staining regions
D. All

# In angiosperms, embryo sac denotes:
A. Mega-gametophyte
B. Mega sporophyll
C. Mega sporangium
D. None

# Another name of alternation of generation:
A. Metagenesis
B. Metamorphosis
C. Metanotum
D. None

# In which of the following we find seed but no fruit:
A. Pteris
B. Cycas
C. Selaginella
D. Lichens

# Which process occurs in chloroplasts?
A. Photophosphorylation
B. Oxidative phosphorylation
C. Respiratory chain
D. All

# Herbicide kills grasses(weeds) by:
A. Closing stomata and inhibiting gaseous exchange
B. Blocking PS II
C. Inhibiting respiration
D. Inhibiting absorptionn of water

# Pheromones are:
A. Biopesticide
B. Bioinsecticide
C. Antifedent
D. All

# After spraying DDT crop yield decreases few yeears later due to:
A. Inactivation of enzyme
B. Decrease in mineral absorption
C. Decrease in rate of metabolism
D. All

# Bread becomes mouldy when exposed to air because of the presence of spores of Mucor/Rhizopus in:
A. Surface of bread
B. Surrounding atmosphere
C. Both
D. None

# A couple, both carriers of lethal genes have their children viability probability as:
A. All disease free
B. 2 carriers and 1 disease free
C. 1 carrier and two disease free
D. half carrier and half disease free

# Which process affects carbon cycle?
A. Afforestation
B. Excessive use of coal and petroleum
C. Excessive use of biofertilizers
D. All

# The term 'ecosystem' was first coined by:
A. Tansley
B. Reiter
C. Linnaeus
D. Odum

# Which of the following is a retroperitoneal organ?
A. Spleen
B. Testes
C. Heart
D. Kidney

# In pancreas, insulin and glucagon secretion is done by:
A. alpha and alpha cells
B. alpha and beta cells
C. beta and beta cells
D. beta and alpha cells

# Dental formula of a 13 year old is:
A. 2023
B. 2123
C. 1223
D. 2122

# Blood contains particles which are:
A. +vely charged
B. -vely charged
C. Both
D. None

# During ovulation which hormone secretion increases:
A. L.H.
B. F.S.H.
C. L.H. and F.S.H. both
D. High L.H. and Low F.S.H

# Female Schistosoma is lodged inside ________ canal of male.
A. Inguinal
B. Laurer's
C. Gyanecophoric
D. None

# Conduction velocity is highest in:
A. thick myelinated nerve fiber
B. thin myelinated nerve fiber
C. non myelinated nerve fiber
D. Axon myelinated nerve fiber

# In earthworm, excretion takes place through:
A. Nephridia
B. Malphigian tubules
C. Flame cells
D. Fat body

# A projection in the alimentary canal of earthworm that increases absorptive surface area is:
A. Villi
B. Typhlosole
C. Gizzard
D. Stomach

# In which of the following blood does not act as O2 carrier?
A. Neries
B. Cockroach
C. Frog
D. Earthworm

# Lacteals, which are related to fat absorption, are found in:
A. Liver
B. Pancreas
C. Villi
D. Stomach

# Megaloblastic anemia is caused due to deficiency of:
A. Fe
B. Vit B12
C. Vit A
D. Vit K

# Pseudopodia retains its movement due to change in:
A. Viscosity
B. Pressure
C. Water movement
D. Pellicle

# Reasoning power is maximum in human due to the development of:
A. Cerebellum
B. Medulla
C. Cerebral cortex
D. Cerebrum

# Which of the following vitamin has role in coltting of blood?
A. C
B. A
C. K
D. All

# Asthma is:
A. Irregular spasm in bronchi
B. Inability of lung to respire
C. Failure of heart to pump blood
D. Collapse of trachea

# A blood group that does not have any antigen but possesses both A and B antibodies is:
A. A
B. B
C. O
D. AB

# Vector of Kala-Azar is:
A. Sandfly
B. Tse Tse fly
C. Female Anopheles
D. House fly

# The blood cell in frog, which is found in maximum number and act as scavenger is:
A. Neutrophil
B. RBC
C. Eosinophil
D. Platelets