First heart transplant was performed by
Salivary duct of Cockroach opens at
Moulting Hormone is secreted by
Which of the following are liver waste products?
Which of the following anemia types is an example of a genetic disorder?
Budding as normal mode of asexual reproduction occurs in:
Red blood cells survive around _____ days.
The purpose of the soft palate is to __________________.
The parent stock of wheat crop responsible for green revolution in India was imported from
Which one yields resin, timber and pulp?
What is the source of the chewing gum?
One of the plants introduced from old world to the new world of
One of the following is a source of rubber
Angoora wool is obtained from a
Maximum biomass of autotrophs in oceans is made of
The scientist who coined the term ecosystem was
Goitre can occur as a consequence of all the following except
Hormones thyroxine and adrenaline and pigment melanin formed from
Hormones are protein in nature. They have a very crucual role in the metabolism and other biological functions of the body. Based on their nude of action, hormones are classified into endocrine and exocrine hormones.
Thyroxine is synthesized by the iodification of tyrosine.
Adrenaline is also synthesized from tyrosine with levodopa, dopamine and norepinephrine as intermediates.
Melanin is synthesized from tyrosine with DOPA, DOPA quinone, DOPA chrome as intermediates.
So, the correct answer is option C. Tyrosine.
The enzymes which are commonly used in genetic engineering are
Patients suffering from alkaptonuria have an abnormal compound in urine known as :
Cycas is said to be living fossil because -
The first law given by Mendel, was
In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) dominant over shortness (t). A plant (T) dominant genotype is crossed with plant of rrtt genotype. The progeny is
Average female to male ratio in world population is
Hepatitis-B is also called
The bone attached to the inner surface of the eardrum is called
Deficiency of vatimn A in the body results in insufficent rhodopsin in the rods which leads to
Difference between male and female Anopheles occurs in
Which of the following is NOT a lymphoid organ?
Which of the following is TRUE of lymph nodes?
Milk glands are characteristic of:
An essential element is that which
The swift locomotion in Sepia and Octopus is effected by:
Renewable source of energy is
The process of photosynthesis is
Chief functions of leaves are
A person who studies about the origin, evolution, variation and classification of plants, is referred as
Which one controls flowering in long day plants and sex expression in certain species?
Who discovered photoperiodism?
Nitrogen fixation occurs in
In which one of the following pathogens do the cells of promycelium after the germination of teleutospore produce infection hyphae instead of basidiospores?
Positive pollution of soil is due to
Nitrogen oxides formed during emission from automobiles and power plants are a source of fine air partilces which lead to
Which cell of Leucosolenia sponge is self replicating and capable of giving rise to other cells
Cells of sertoli are found in
Male gametophyte of angiosperms is said as
Correct definition of pollination is
Product of glycolysis is
Pyruvic dehydrogenase is used in converting
The product of the reaction between Hb and O2 is
A poison that destroys carbonic anhydrase will cause death from
Muhlenbeckia (=Cocoloba) is an example of
Number of fertilized eggs in ootheca of Cockroach is
Chloragogen cells are present in
In biological terminology, a group similar organisms which are actually or potentially capable of successful interbreeding with the production of fertile offspring is generally referred to as -
Dry seeds when placed in water swell up due to
Filtrate enters the Bowman’s capsule by
Antidiuretic hormone (ADH) has an effect on the