Tyrosinase is a copper containing oxidase which is widely distributed in plants, animals including h...

The concentration of lead in blood averages about 25 μg /100 mL. Increase to 70 μg /100 mL

Sinoatrial node is the pace maker of the heart. Hence the replacement will be done at the site of S...

Ontogeny recapitulates phylogeny of Haeckel.

Birds have four chambered heart, rib cage and are homeothermic.

Pellagra is due to deficiency of Vitamin $B_ 3$ -Niacin.

Pellagra is due to deficiency of Vitamin $B_ 3$ -Niacin.

Carbon dioxide concentration increases in the blood whenever there is a general obstruction to norma...

Earlier atmosphere on the earth was a reducing one with no oxygen.

Leishmaniasis is caused by Leishmania donovani.

These secretions help in:(i) Secretion of pancreatic juice by pancreas.(ii) Release of bile from gal...

Myosin contains ATPase enzyme that is needed for muscle contraction.

Uric acid is least soluble and least toxic nitrogenous waste. Organisms that excrete uric acid are c...

Bhopal gas tragedy occurred (3 Dec 1984) when MIC reacted with water in a tank, an exothermic chemic...

The enzyme nitrogenase is required for the process of biological nitrogen fixation only. Fixation of...

Prolactin is secreted by anterior pituitary gland which stimulates mammary gland development during ...

Tongue movement is controlled by glossopharyngeal nerve.Vagus nerve is a mixed cranial nerve, contro...

Ovulation takes place under the influence of LH and FSH. It normally takes place at the end of proli...

Epinephrine is synthesized from amino acid tyrosine. While estrogen and progesterone are modified&nb...

In Insecta, the body is divided into head, thorax and abdomen.

Chimpanzee is more closely related to man than other hominoids. It is evidenced by chromosome bandin...

Electron Spin Resonance (ESR) or Electron Paramagnetic Resonance (EPR) measures the number of change...

There is a number of marker genes which are commonly described as reporter genes that are genes. Som...

Heparin, sodium oxalate are anti coagulants. So they can be used. Calcium carbonate leads to blood c...

Carbon monoxide has high affinity to haemoglobin in comparison with oxygen. It combines with haemogl...

Secondary nucleus of female would have 2n chromosome that would be fertilized by male gametes which ...

Chromosomes would have condensed maximally and would be seen clearly at the equatorial plate.

Adiantum caudatum-Walking fern because its leaf tips when come in contact w...

An organism (such as bacterium) that will grow on a minimal medium is called&nbs...

t-RNA has a clover leaf structure and was proposed by Holley.

According to Union Petroleum Minister, 5% of alcohol (ethanol) will b...

Black soil forms the largest group. It is developed mainly on the Deccan traps of Maharashtra, Madhy...

Stability is the power of a system to be in their state against unfavourable factor. Resilience is t...

In the present case the male parent (not female) had mutation in mitochondria, there are negligible ...

Shade tolerant plants have lower photosynthetic rates and hence, lower growth rates. On the other ha...

AB blood group has no antibodies and hence can receive blood from any group. Therefore, it is called...

Micropropagation is the practice of rapidly multiplying stock plant material to produce a large...

Photosynthetically active radiation (PAR) is light of wavelengths 400-700 nm and is t...

The base ratio $A + \frac{T}{G} + C$ may vary from one species to another, but is constant for a giv...

India's wheat yield revolution in 1960s was possible primarily due to the mutations r...

The genotype of human male in question must be Aa Bb XhY.  Hence 2 x 2 x 2 = 8 types of ga...

In eukaryotes, the cell cycle consists of a long preparatory period, called interphase. In...

Fermentation is due to anaerobic respiration of microbes

Crossing over occurs between non sister chromatids of a bivalent resulting in variations.

The exponential or log phase is a time of maximum growth. In the stationary...

Flagella of prokaryotic and eukatyotic species differ in micro-tubular organization and type of move...

At telophase stage, nuclear membrane vesicles associate with the surface of individual chromosomes a...

At telophase stage, nuclear membrane vesicles associate with the surface of individual chromosomes a...

Agrombacterium tumefaciens is considered to be a natural genetic engineer and it is the most thoroug...

Key stone species holds the community organization.