Types of RNA

Type of RNA found in the matrix of mitochondria

A : RNA polymerase is of three types in eukaryotes for the synthesis of all types of RNAs. R : RNA polymerase consists of six types of polympeptides alongwith rho factor which is involved in termination of RNA synthesis.

Assertion : There is single DNA-dependent RNA polymerase that catalyses transcription of all types of RNA (mRNA, tRNA and rRNA) in eukaryotes. Reason : In bacteria, there are at least three RNA polymearases are required.

Mark these statement as true (T) OR false (F) and select the correct option In eukaryotes,only one type of DNA-dependent RNA polymerase transcribes all types of RNAs The human gemone has approximately 30000 genes The untranslate regions (UTRs) of m-RNA are required for efficient translation process.

Fill in the blanks : (i) Glycogen is the main reserve food material of _______ cells. It is known as the ______ . (ii) Starch is the reserve food material of ______ cells. It has two components : amylose and _______ . (iii) Some important heteropolysaccharides include hyaluronic acid, heparin, chondroitin sulphate etc. which are together grouped as _______ . (iv) _________ of connective tissue, actin and myosin of muscles and ______ of scales, feathers, hairs etc. are fibrous proteins. (v) DNA has ______ and ________ (double-ringed purines) and _______ and _______ (single-ringed pyrimidines). (vi) There are three major types of RNA in every cell : m- RNA, ______ and _____ .

The type of RNA which is required for translation process is:

The type of RNA that characteristically contains methylated purines and pyrimidines is :

Name two different type of RNA molecules found in the cells of organisms.

The type of RNA responsible for proper se- quence of amino acids in protein synthesis is