Explain with the help of a suitable example the naming of a restriction endonuclease.
The naming of a restriction endonuclease is done in the following way:
Ist letter represents the genus of the organism from which the enzyme is derived.
IInd and IIIrd letters represent the species of the organism.
IVth letter represents the name of the strain.
Roman number represents order of isolation. For example, In EcoRI − Derived from E.coli, strain R. It is the Ist to be discovered.
Fill in the blanks:
(a) Humans reproduce __________. (asexually/sexually)
(b) Humans are__________. (oviparous/viviparous/ovoviviparous)
(c) Fertilization is __________ in humans. (external/internal)
(d) Male and female gametes are __________. (diploid/haploid)
(e) Zygote is __________. (diploid/haploid)
(f) The process of release of the ovum from a mature follicle is called__________.
(g) Ovulation is induced by a hormone called the __________.
(h) The fusion of male and female gametes is called _____________.
(i) Fertilisation takes place in _____________.
(j) Zygote divides to form _____________which is implanted in uterus.
(k) The structure which provides vascular connection between fetus and uterus is called ____________.