ment id- 107541, 18 course.id- 23126.18content,ide 964327 18estep-mull QUESTION

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ment id- 107541, 18 course.id- 23126.18content,ide 964327 18estep-mull QUESTION 11 The specificity of base pairing is brought about by hydrogen bonds that form behween the bases of DNA How many hydrogens bond adenine and thymine together and now many hold cytosine and guanine together? A Adenine and thymine are held together B. Adenine and thymne are held together O D. Adenine and thymine are held by 4 hydrogens and cylosine and guanineby 3 hydrogens and cytosine and are held together by 2 hydrogens Adenine and thymine are held together by 2 hydrogens and cytosine and guanine are heid togemer by 4 hydrogens together by 2 hydrogens and cytosine and guanine are held together by 3 nydrogens guanine are held together by 2 thydrogens QUESTION 12 Most off the key moleculies in celts and development are the cel ncluding the enzymes that convert energy into usable torms and others tmat provide stuctural support for acts indirectly by specitying the sequence of amino acid subunts QUESTION 13 [1| is the molecule by which heredtary information is transmimied from generation to generation QUESTION 14 Most genes are transcrted at certain times, under certain connons, or un certa n types or ' but [1] are transcreed continualy as ser products are needed at artines n aa ces QUESTION 15 A 11] consuists of a segment of DNA wrapped around eignt histone proteins QUESTION 16 n bacteria, promoter recognition for tramscnpson s mediated by a pioten called |11 witach associates with RNA poltymerase and taescsrates ts binding to specitic promoters Chek Save and Sulmit o save and ubit, Chick Save All Ansuers to save all oacers

Explanation / Answer

11

Adenine is a purine which forms 2 H-bond with the thymine which is a pyrimidine.

Guanine is a purine which forms 2 H-bond with the Cytosine which is a pyrimidine.

So the correct answer is option D.

12- most the cellular components are made up of proteins which helps in regulating the cell and help in performing all the function carried out inside the cell.

DNA has the genes which coded for specific proteins. Order of nucleotides in the gene specifies the protein

SO answer is protein and DNA.

13- DNA is hereditary material of the organism which passes to the daughter cells when the cells divide DNA also present in the gametes which upon fusion leads to the formation of the zygote and help in the development of the progeny fro the zygote.

Answer is DNA

14- Housekeeping genes are the gene which transcribed in all the cells at all the time. These genes carry out the basic function of cells like glycolysis, protein synthesis, DNA replication.

SO the answer is housekeeping genes

15- nucleosomes is the structure in which DNA is wrapped around the histone protein core. Histone protein H2A, H2B, H3 and H4 make the core of the nucleosomes.

Answer is nucleosomes

16- Sigma factor is a protein which recognizes the promoter region of the gene. Sigma factor ensure that the RNA polymerase binds tightly to the promoter region and prevents premature unloading of RNA polymerase

5- ALl the types of RNA are synthesized from the DNA by the process called as transcription

mRNA- it the message RNA which has the sequence for the protein synthesis.

rRNA- It main part of the ribosome along with proteins. It helps in the formation of peptide bonds between the two amino acid of the synthesizing peptide.

tRNA- It carries amino acid to the site of protein synthesis i.e. Ribosomes.

So the answers are -

mRNA - A

rRNA -B

tRNA -C

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