molecular basis of genetics

1. IN eukaryotes which of the following is removed from initially transcribed rna before it is transported to the cytoplasm for translation

• 1. intron

• 2. 3 'poly A tail

• 3. ribosome binding site

• 4. 5'cap

In the base sequence of strand of TEMPLET dna is CAT TAG CAT CAT GAC what would be the base sequence of its complementary mrna ?

• 1. GUA GUA CUG AUC CUG

• 2. AUG CUG CUC GUA CUG

• 3. GUA AUC GUA GUA CUG

• 4.GUC CUG CUG CUA CUU

DNA act as a templet for synthesis of

• 1.RNA

• 2.DNA

• 3. BOTH 1 AND 2

• 4. PROTEIN

4. RNA POLYMERASE CONTAINS multiple polypeptide units. for initiating RNA synthesis , it requires ??

• 1. sigma factor

• 2. alpha factor

• 3. beta factor

• 4. gama factor

5. Regions of transcriptional units are

a. exon b. intron c. pomoter d. structural gene e. terminator

f. cistron

• 1. a, b and c

• 2.b, c and d

• 3.c,d and e

• 4.d ,e and f

6. Reverse transcriptase is ??

• 1. dna dependent dna polymerase

• 2.Rna dependent dna polymerase

• 3.DNA dependent rna polymerase

• 4.RNA dependent rna polymerase

7. 5'-3' end of DNA strand is called ??

• 1.non- template strand

• 2.sense strand

• 3.coding strand

• 4.all of the above

8. THE terminator in a transcriptional unit is present in the ....A...... END. IT is also called .....B........ . It defines the.....C...... of the pocess of transcription.

choose the correct option for A,B,and C.

• 1. A-3', B- downstream, C-end

• 2.A-3', B -upstream,

  end

• 3.A-3', B-upstream ,C- beginning

• 4. A- 5', B- UPSTREAM , C- beginning

9. IF double stranded RNA is produced during transcription, it

• 1. would prevent RNA from being translated into protein

• 2. would not prevent RNA from being translated into protein

• 3.will lead to continuous synthesis of RNA

• 4. will give rise to double stranded RNA with lower stability

10. Identify the correct statement??

• 1. Transcription can only occur after translation

• 2. transcription and translation occur simultaneously in some organisms

• 3. translation occurs before transcription

• 4. transcription and translation are alternative terms for same process