The trisomy for 21st chromosome is called
Options
(a) Klinefelter’s syndrome (b) Turner’s syndrome (c) Down’s syndrome (d) sickle-cell anaemia
Correct Answer:
Down’s syndrome
Explanation:
No explanation available. Be the first to write […]
There are 64 codons in the genetic dictionary as
Options
(a) there are 3 nonsense codons and 61 sense codons (b) there are 64 different types of tRNA (c) there are 64 amino […]
There are special proteins that help to open up DNA double helix in front of the replication fork. These proteins are
Options
(a) DNA gyrase (b) DNA ligase (c) DNA polymerase I (d) DNA […]
Transition type of gene mutation is caued when
Options
(a) GC is replaced by TA (b) AT is replaced by CG (c) CG is replaced by GC (d) AT is replaced by GC
Trisomy is expressed as
Options
(a) 2n + 1 (b) 2n – 1 (c) 2n +2 (d) 2n – 2
Correct Answer:
2n + 1
Explanation:
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Unwinding of DNA is done by
Options
(a) topoisomerase (b) exonuclease (c) helicase (d) ligase
Correct Answer:
helicase
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
What does the following indicate ? Parent R¹R¹(Red) × R²R²(White) F₁ R¹R²(Pink) F² 1/4 Red : 1/2 Pink : 1/4 White
Options
(a) complete dominance (b) over dominance (c) incomplete dominance (d) codominance
When a dwarf pea plant was treated with gibberellic acid, it became as tall as tall pea plants. If these pea plants are crossed with pure tall plants, then what will be the phenotypic ratio […]
When a tall and red flowered individual is crossed with a dwarf and white flowered individual, phenotype in the progeny is tall and red. What will be the genotype of tall and red flowered progeny? […]
Which is not related with eukaryotic mRNA?
Options
(a) intron, exon (b) ribosomes binding site (c) poly A tail (d) Okazaki piece
Correct Answer:
Okazaki piece
Explanation:
No explanation available. Be the first […]
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