STD 12 - 8. microbes in human welfare — NEET STD 11 Science — Question

Delete odd one

The acrosome plays important role in

Glenoid cavity articulates:

Trachea divides into right and left

Colour blindness is a disease usually affecting man but the factor for it is transmitted to the children always by woman. This is because particular factor is located on

Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (mostly in the nucleus) ?

Which of the following statements regarding mutation are correct ?
(i) Mutation is a phenomenon which results in alteration of DNA sequences and consequently results in changes in the genotype and phenotype of an organism.
(ii) Gene/Point mutation is responsible for Sickle- cell anaemia.
(iii) Chromosomal mutation is responsible for Down's syndrome.
(iv) In addition to recombination, mutation is another phenomenon that leads to variation in DNA.
(v) Chromosomal aberrations are commonly observed in cancer cells.
(vi) Deletions of base pairs of DNA, causes frame- shift mutations but not by insertion of base.