Molecular Basis of Inheritance

Which of the following statements are correct with reference to a transcription unit? Choose the correct answer from the options given below:

1. B, C, D and E only
2. A, B, C, D and E
3. A, B, C and D only
4. A, C, D and E only

Which of the following enzymes synthesizes precursor mRNA?

1. DNA polymerase
2. RNA polymerase I
3. RNA polymerase II
4. RNA polymerase III

Which of the following are the post-transcriptional events in a eukaryotic cell? Choose the correct answer from the options given below :

1. B, C, E only
2. C, D, E only
3. A, B, C only
4. B, C, D only

Which factor is important for termination of transcription?

1. (rho)
2. (gamma)
3. (alpha)
4. (sigma)

A transcription unit in DNA is defined primarily by the three regions in DNA and these are with respect to upstream and down stream end;

1. Repressor, Operator gene, Structural gene
2. Structural gene, Transposons, Operator gene
3. Inducer, Repressor, Structural gene
4. Promoter, Structural gene, Terminator

Which one is the correct product of DNA dependent RNA polymerase to the given template? 3'TACATGGCAAATATCCATTCA5'

1. 5'AUGUACCGUUUAUAGGUAAGU3'
2. 5'AUGUAAAGUUUAUAGGUAAGU3'
3. 5'AUGUACCGUUUAUAGGGAAGU3'
4. 5'ATGTACCGTTTATAGGTAAGT3'

Match List I with List II: Choose the correct answer from the options given below :

1. A-II, B-IV, C-I, D-III
2. A-III, B-II, C-IV, D-I
3. A-III, B-IV, C-I, D-II
4. A-IV, B-III, C-I, D-II

Given below are two statements regarding RNA polymerase in prokaryotes. In the light of the above statements, choose the correct answer from the options given below :

1. Statement I is true but Statement II is false
2. Statement I is false but Statement II is true
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect

What is the role of RNA polymerase III in the process of transcription in Eukaryotes?

1. Transcription of tRNA, 5S rRNA and snRNA
2. Transcription of precursor of mRNA
3. Transcription of only snRNAs
4. Transcription of rRNAs (28S, 18S and 5.8S)

Which one of the following is the sequence on corresponding coding strand, if the sequence on mRNA formed is as follows 5′ AUCG AUCG AUCG AUCG AUCG AUCG AUCG 3′?

1. 3′ UAGC UAGC UAGC UAGC UAGC UAGC UAGC 5′
2. 5′ ATCG ATCG ATCG ATCG ATCG ATCG ATCG 3′
3. 3′ ATCG ATCG ATCG ATCG ATCG ATCG ATCG 5′
4. 5′ UAGC UAGC UAGC UAGC UAGC UAGC UAGC 3′

What is the role of RNA polymerase III in the process of transcription in eukaryotes?

1. Transcribes only snRNAs
2. Transcribes rRNAs (28S, 18S and 5.8S)
3. Transcribes tRNA, 5S rRNA and snRNA
4. Transcribes precursor of mRNA

Identify the correct statement.

1. Split gene arrangement is characteristic of prokaryotes
2. In capping, methyl guanosine triphosphate is added to the 3' end of hnRNA
3. RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria
4. The coding strand in a transcription unit is copied to an mRNA

Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?

1. DNase
2. DNA dependent DNA polymerase
3. DNA dependent RNA polymerase
4. DNA Ligase

Name the enzyme that facilitates opening of DNA helix during transcription.

1. DNA polymerase
2. RNA polymerase
3. DNA helicase
4. DNA ligase

AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?

1. AGGUAUCGCAU
2. UGGTUTCGCAT
3. ACCUAUGCGAU
4. UCCAUAGCGUA

Which of the following RNAs should be most abundant in animal cell ?

1. m-RNA
2. mi-RNA
3. r-RNA
4. t-RNA

Spliceosomes are not found in cells of :

1. Bacteria
2. Plants
3. Animals
4. Fungi

The equivalent of a structural gene is -

1. cistron
2. recon
3. muton
4. operon

DNA-dependent RNA polymerase catalyzes transcription on one strand of the DNA which is called the

1. coding strand
2. antistrand
3. template strand
4. alpha strand

Select the correct option ;

1. Direction of RNA synthesis 3'–5', Direction of reading of the template DNA strand 5'–3'
2. Direction of RNA synthesis 5'–3', Direction of reading of the template DNA strand 5'–3'
3. Direction of RNA synthesis 5'–3', Direction of reading of the template DNA strand 3'–5'
4. Direction of RNA synthesis 3'–5', Direction of reading of the template DNA strand 3'–5'

Removal of introns and joining of exons in a defined order during transcription is called

1. Looping
2. Inducing
3. Slicing
4. Splicing

If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence

1. ATCGU
2. UAGAC
3. AACTG
4. TTAGU

Which one of the following is not a part of a transcription unit in DNA ?

1. The structural gene
2. The inducer
3. A terminator
4. A promoter

Removal of RNA polymerase-III from nucleoplasm will affect the synthesis of

1. tRNA
2. hnRNA
3. rRNA
4. mRNA

In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the -

1. Dictyosomes
2. Ribosomes
3. Nucleus
4. ER

Removal of introns and joining the exons in a defined order in a transcription unit is called:

1. Transformation
2. Capping
3. Splicing
4. Tailing

During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at the point. What is the sequence called?

1. TATA box
2. GGTT box
3. CAAT box
4. AAAT box

During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the mRNA would be -

1. UAUGC
2. TCTGG
3. UATGC
4. TATGC

During transcription, the DNA site at which RNA polymerase binds is called:

1. Receptor
2. Regulator
3. Enhancer
4. Promoter