42) a pyrimidine of the DNA double helix are held together by ____ 43) the backb

ID: 191287 • Letter: 4

Question

42) a pyrimidine of the DNA double helix are held together by ____

43) the backbone of the DNA double helix is made up of molecules of ______ and _______

44) the two strands of the DNA double helix are held together by _______ bonds

45) base pairing rules state that _____ always bonds to thymine and guanine always bonds to _______.

46) three type pf RNA and their functions are

47) a high energy compound that takes part in most energy exchanges in a cell is ________ ________

10) in the chemical formula C H O there are _______ carbon atoms _____ hydrogen atoms and ______ oxygen atoms

42) a pyrimidine of the DNA double helix are held together by three hydrogen bonds.

43) the backbone of the DNA double helix is made up of molecules of deoxyribose sugar and phosphate group.

44) the two strands of the DNA double helix are held together by hydrogen bonds.

45) base pairing rules state that adenine always bonds to thymine and guanine always bonds to cytosine.

46) three type of RNA and their functions are as follows:

i) r-RNA - at the time of protein synthesis, it provides attachment site to t-RNA and m-RNA and attaches them on ribosomes.

It attaches t-RNA to larger subunit and m-RNA to smaller subunit.

ii) t-RNA - it acts as carrier of amino acid.

Codons are recognised by anticodons of t-RNA.

iii) m-RNA - it carries coded information for translation into polypeptide formation.

It has a cap region for attachment to ribosomes.

47) a high energy compound that takes part in most energy exchanges in a cell is ATP (adenosine tri phosphate)

10) in the chemical formula CHO there are 'n' carbon atoms '2n' hydrogen atoms and 'n' oxygen atoms.

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