STD 12 - 7. human health and disease — Biology STD 12 Science — Question

$(a)$ Euchromatin is loosely packed chromatin

$(b)$ Heterochromatin is transcriptionally active

$(c)$ Histone octomer is wrapped by negatively charged DNA in nucleosome

$(d)$ Histones are rich in lysine and arginine

$(e)$ A typical nucleosome contains $400\,bp$ of DNA helix

Choose the correct answer from the options given below:

$(a)$ It results in the formation of haploid gametes

$(b)$ Differentiation of gamete occurs after the completion of meiosis

$(c)$ Meiosis occurs continuously in a mitotically dividing stem cell population

$(d)$ It is controlled by the Luteinising hormone (LH) and FollicleStimulating Hormone (FSH) secreted by the anterior pituitary

$(e)$ It is initiated at puberty

Choose the most appropriate answer from the options given below: