Molecular basis of inheritance practice · Mixed difficulty

Which one of the following is the starter codon?

Assertion (A): The gene I codes for the repressor of the lac operon.

Reason (R): The y-gene codes for permease, which increases permeability of the cell to $\beta$-galactosidase.

In DNA structure, Nobel Prize was given to

DNA sequence that code for protein are known as

Promoter in a transcription unit is located at

The base sequence in mRNA transcribed from DNA having base sequence $5^{\prime}$ CTTAG $3^{\prime}$ in its coding strand would be

During infection of E.coli cells by bacteriophage ${T_2},$

In lac operon which gene transcribe mRNA for polypeptide synthesis.

Which one of the following is correctly matched?

In an E.coli strain $i$ gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?

Which of the following enzyme is used in DNA multiplication?

Sickle cell anaemia results from a single base substitution in a gene , thus it is example of

DNA can be formed by

From his transformation experiment Griffith concluded with transforming principle might be?

In the formation of polynucleotide chain, the number of different types of nucleotides that participate are

Assertion: RNA produced during transcription
in eukaryotic cells cannot be straight away used
in photosynthesis.

Reason: RNA splicing phenomena helps in the
removal of exons.

(A) : Retroviruses mutate and evolve faster

(R) : Retrovirus have RNA genome

Among the pyrimidines, this is common for both DNA and RNA?

In bacterium, permease is located in?

In bacterium E. Coli function of this is clearly not known?

Choose the correct pair of RNA type and its function.

The codon AUG codes for Methionine. What would be the base sequence on anti-codon loop of tRNA that would be amino acylated with this amino acid?

Assertion: The uptake of DNA during transformation is an active, energy requiring process.

Reason: Transformation occurs only in those bacteria, which possess the enzymatic machinery involved in the active uptake and recombination.

Identify the statements pertaining to the regulatory genes (R), associated with the lac operon that are incorrect.

(i) mRNA is transcribed from the R gene whether lactose is present or not.

(ii) mRNA is transcribed from the R gene only when the lactose is present.

(iii) mRNA is transcribed from the R gene only when the lactose is not present.

(iv) Lactose inhibits the translation or R gene mRNA.

RNA formed from the transcription of DNA has base sequence $5^{\prime}$ AUUAUGAAA $3^{\prime}$. What would be the sequence of coding strand of DNA?

DNA replication is
(A) Polymerization of nucleotides by DNA-dependent DNA polymerase activity
(B) Energetically very expensive process.
(C) Polymerization of ribonucleotides in 5'→3' direction

$\mathrm{hn}$RNA undergoes two additional processing. Out of which, in one of them an unusual nucleotide (methyl guanosine triphosphate) is added to the 5’ – end of $\mathrm{hn}$ RNA. This is known as

In the structure of polynucleotide chain, phosphoester linkage joins

Which of the following types of $RNAs$ plays both structural and catalytic role during translation?

Ribose sugar is present in