Which one of the following microorganisms is used for the production of citric acid in industries?
A. Lactobacillus bulgaricus
B. Penicillium curriculum
C. Aspergillus niger
D. Rhizopus nigricana

Statins are produced by the yeast.
A. Monascus purpureus
B. Saccharomyces cerevisiae
C. Trichoderma polysporum
D. Aspergillus niger

Information transfer from RNA to DNA is called
A. Replication
B. Translation
C. Transcription
D. Reverse transcription

The adapter molecule is :
A. m-RNA
B. r-RNA
C. t-RNA
D. hn-RNA

In a DNA strand the nucleotides are linked together by
A. Glycosidic bond
B. Phosphodiester bond
C. Peptide bond
D. Hydrogen bond

Clover leaf model of tRNA is
A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure

A nucleoside differs from a nucleotide, where it lacks the
A. Nitrogen base
B. Pentose sugar
C. Phosphate group
D. Hydroxyl group

In DNA replication, discontinuously synthesized DNA fragments are later joined by
A. DNA polymerase
B. DNA ligase
C. DNA Gyrase
D. DNA

In the equation dN/dt=rN, the letter 'r' denotes
A. Intrinsic rate of natural increase
B. Carrying capacity
C. Population density
D. Respiration losses

The process in which the reproductive fitness of one species is significantly lower in the presence of another species is
A. Predation
B. Competition
C. Parasitism
D. Mutualism

Cuckoo lays its eggs in the nest of crow is an example of :
A. Mutualism
B. Brood parasitism
C. Commensalism
D. Predation

Presence of a special photosynthetic pathway (CAM) is seen in
A. Cactus
B. Banyan
C. Rose
D. Banana

The population interaction in which one species get benefit and other one is neither benefitted nor harmed
A. Mutualism
B. Commensalism
C. Amensalism
D. Parasitism

According to Allen's rule the mammals from colder climate have
A. Longer ears and shorter limbs
B. Shorter ears and shorter limbs
C. Shorter ears and longer limbs
D. Longer ears and longer limbs

Animal that can tolerate wide range of Salinity are called
A. Euryhaline
B. Stenohaline
C. Anadromus
D. Catadromus

To avoid summer related problems like heat and desiccation some snails and fishes go into
A. Hibernation
B. Diapause
C. Aestivation
D. Dormancy

Brood parasitism is seen in
A. Birds
B. Human
C. Reptiles
D. Fishes

Example for Mutualism is
A. Wasp and Fig plant
B. Orchid and Mango plant
C. Tortoise and goat
D. Ticks and dog

Under unfavourable conditions many Zooplanktons species in lakes known to enter a suspended development stage is called
A. Aestivation
B. Diapause
C. Heibernation
D. Sporulation

Pseudocopulation (Sexual deceit) is found in
A. Amorphophallus
B. Ophry’s orchid
C. Fig
D. Rafflatia

The formula of exponential population growth curve is
A. dN/dt = rN
B. dt/dN = rN
C. dN/rN = dt
D. rN/dN =dt

Natality refers to
A. Death Rate
B. Birth Rate
C. Number of individuals leaving the habitat
D. Number of individuals entering a habitat

An orchid growing as an epiphyte on a mango branch is an example of :
A. Mutualism
B. Commensalism
C. Parasitism
D. Amensalism

ZZ-ZW type of sex determination is seen in
A. Platypus
B. Snail
C. Cockroach
D. Peacock

Identify the sex-linked recessive disorder in which clotting of blood is affected.
A. Haemophilia
B. Colour blindness
C. Cystic fibrosis
D. Sickle cell anaemia

44A + XXY chromosome compliment occurs in
A. Down syndrome
B. Turner syndrome
C. Klinefelter's syndrome
D. Bleeders syndrome

Which of the following organism does not show parthenogenesis.
A. Turkey bird
B. Honeybee
C. Rotifers
D. Hydra

Female heterogamety is observed in
A. Birds
B. Fruit fly
C. Grass hopper
D. Honey bee

Identify the sex-linked recessive genetic disorder among the following
A. Phenylketonuria
B. Sickle cell anaemia
C. Colour blindness
D. Thalassemia

Genotypic and Phenotypic ratio is same incomplete dominance is
A. 3 : 1
B. 9 : 3 : 3 : 1
C. 1 : 2 : 1
D. 1 : 1