The cell membrane is made up of a phospholipid bilayer with integrated proteins. The main function of a cell membrane is to protect the cell from... View Article
The smallest taxonomic group is species, which has organisms of one species. The smallest taxonomic group having different species is a genus.... View Article
Interphase is the longest phase in a cell’s life cycle. It accounts for 95 per cent of the duration of the cell cycle. The other phase is the M... View Article
Most of the pteridophytes are homosporous. They produce only one kind of spores. Some genera of pteridophytes are heterosporous, e.g. Selaginella... View Article
Secretin, gastrin and CCK or cholecystokinin are the hormones secreted by different parts of the gastrointestinal tract. They regulate the... View Article
ADH is secreted by the posterior pituitary gland. It is an antidiuretic hormone also known as vasopressin. It increases water reabsorption from... View Article
Phelloderm or secondary cortex is formed by redifferentiation. They are formed by dedifferentiated meristematic cells called cork cambium or... View Article
Lac operon is an inducible operon. It is induced by the presence of lactose or allolactose, which inactivate the repressor and allow RNA... View Article
No, Lac operon is not an anabolic operon. Lac operon is a catabolic operon, which produces enzymes that break down lactose. It is an inducible... View Article
Turner syndrome is caused due to the absence of an X chromosome. They have 45 chromosomes with XO. They are females with short stature and... View Article
Yes, Klinefelter syndrome is a trisomy of sex chromosome. There occurs an extra copy of the X chromosome. They have 47 chromosomes with XXY.... View Article
Variations exist in the DNA of brothers and sisters also. This is due to crossing over and recombination occurring at the time of gamete... View Article
No, siblings don’t necessarily have the same blood type. It depends on the genotype of both the parents for the gene determining the blood type.... View Article
Codominance shows both the allelic traits in the offspring, e.g. in the ABO blood group system A and B are codominant over O and when A and B are... View Article
The human genome is located in the 23 pairs of chromosomes present inside the nucleus of each cell. Gametes contain a haploid set, i.e. 23... View Article
Human tailbone or coccyx is a vestigial organ and is reminiscent of the tail, which is present for some period during embryogenesis. Further... View Article
Haemophilia is a bleeding disorder, which is caused due to deficiency of blood clotting factors. Haemophilia A is caused due to deficiency of... View Article
Blood clotting factors are named in Roman numerals, e.g. I, II, VIII, IX, etc. Factor IX is also called the Christmas factor. Deficiency of... View Article
