Protein P becomes functional upon phosphorylation of a serine residue, replacing this serine with . . . . . . . . will result in a phosphomimic mutant of P.
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The RNA primer synthesized during the replication process in bacteria is removed by
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A disease is inherited by a child with a probability of . In a family with two children, the probability that exactly one sibling is affected by this disease is
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The term 'protein splicing' refers to
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Match the terms in Group I with the ploidy in Group II.
| Group I | Group II |
| P. Disome | 1. 2n + 1 |
| Q. Monosome | 2. 2n - 1 |
| R. Nullisome | 3. n - 1 |
| S. Trisome | 4. n + 1 |
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A dioecious plant has XX sexual genotype for female and XY for male. After double fertilization, what would be the genotype of the embryos and endosperms?
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An in vitro translation system can synthesize peptides in all three reading frames of the RNA template. When 5' - UCUCUCUC-(UC)n-UCUCUCUC - 3' was used as the template in this in vitro translation system, the synthesized peptides contained 50% each of serine and leucine. When 5' - CCUCCUCCU-(CCU)n-CCUCCU - 3' was used as the template, the synthesized peptides contained 33.3% each of serine, leucine, and proline. Deduce the codon for proline.
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During protein synthesis, tRNAs are not involved in
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If the nucleotide composition (%) of a viral genome is A = 10, U = 20, C = 40 and G = 30, which one of the following is this genome?
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Which set of the following events occurs during the elongation step of translation?
P. Attachment of mRNA with the smaller subunit of ribosome
Q. Loading of correct aminoacyl-tRNA into the A site.
R. Formation of a peptide bond between the amino acyl-tRNA in the A site and the peptide chain that is attached to the peptidyl-tRNA in the P site.
S. Dissociation of the ribosomal subunits.
T. Translocation of peptidyl-tRNA from the A site to the P site of the ribosome.
P. Attachment of mRNA with the smaller subunit of ribosome
Q. Loading of correct aminoacyl-tRNA into the A site.
R. Formation of a peptide bond between the amino acyl-tRNA in the A site and the peptide chain that is attached to the peptidyl-tRNA in the P site.
S. Dissociation of the ribosomal subunits.
T. Translocation of peptidyl-tRNA from the A site to the P site of the ribosome.
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In a genetic cross between the genotypes WWXX and wwxx, the following phenotypic distributions were observed among the F2 progeny: WX, 562; wx, 158; Wx, 38; and wX, 42. Likewise, a cross between XXYY and xxyy yielded the following results: XY, 675; xy, 175; Xy, 72; and xY, 78. Similarly, a cross between WWYY and wwyy yielded: WY, 292; wy, 88; Wy, 12; and wY, 8. In all the genotypes, capital letters denote the dominant allele. Assume that the F1 progeny were self-fertilized in all three crosses. Also, double cross-over does not occur in this species. Which of the following is correct?
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The major groove of DNA is lined by
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An example for template independent DNA polymerase is
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Synteny refers to
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Which of the following processes can increase genetic diversity of bacteria in nature?
P. Conjugation
Q. Transformation
R. Transduction
S. Transfection
P. Conjugation
Q. Transformation
R. Transduction
S. Transfection
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"Determine the correctness or otherwise of the following Assertion (A) and the Reason (R).
Assertion: N-methyl-N'-nitro-N-nitrosoguanidine (NTG) is an effective chemical mutagen.
Reason: Mutations induced by NTG mainly are the GC → AT transitions."
Assertion: N-methyl-N'-nitro-N-nitrosoguanidine (NTG) is an effective chemical mutagen.
Reason: Mutations induced by NTG mainly are the GC → AT transitions."
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If a segment of a sense strand of DNA is 5'-ATGGACCAGA-3', then the resulting RNA sequence after transcription is
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Which of the following statements with respect to the orientation of the nitrogenous bases to the pentose sugars, and the puckering of the sugar, is correct?
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Of the two diploid species, species I has 36 chromosomes and species II has 28 chromosomes. How many chromosomes would be found in an allotriploid individual?
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Ames test is used to determine
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