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RNA molecules formed inside the nucleus ...

RNA molecules formed inside the nucleus of eukaryotes (i.e. prior or modification.)

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The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells . How is this DNA accommodated ?

Read the following statements and select the correct ones. (i) Electrophoresis is a technique used for the separation of molecules based on their size and charge. (ii) Plasmids are extra-chromosomal, self-replicating, usually circular, double stranded DNA molecules found naturally in many bacteria and also in some yeast,. (iii) It is not advisable to use an exonuclease enzyme while producing a recombinant DNA molecule. (iv) In EcoRl, the roman numberal I indicates that it was the first enzyme isolated from E.coli A) (i) and (ii) B) (iii) and (iv) C) (i),(ii) and (iv) D) (i),(ii),(iii) and (iv)

Assertion : Special methods are used for transformation i.e., incorporation of recombinant DNA into host. Reason : DNA is a hydrophilic molecule.

Refer to the given graph showing state of ionisation of zwitterion. Select the correct statements regarding zwitterion. (i) Zwitterions can be formed from compunds that contain both acid groups and basic groups in their molecules. (ii) A zwitterion can act either as proton donor or proton acceptor. (iii) A monoamine monocarboxylic alpha -amino acid is a acid at high pH as both the groups (amino and carboxyl) lose a proton. (iv) Amino acids in solution at neutral pH exist predominantly as dipolar ions, the amino group is protonated (-NH_(3)^(+)) and the carboxyl group is deprotonated (-COO^(-)) .

Identify the statements as correct or incorrect with explanations for your answer (i) FSH acts on the Leydig cells and stimulates synthesis and secretion of androgens. (ii) The increased level of GnRH acts on the anterior pituitary and stimulates the secretion of gonadotropins, i.e. LH and FSH. (iii) The fully grown primary oocyte completes mitotic division producing two daughter nuclei, i.e. secondary oocyte and first polar body. (iv) Ovum is a rounded, motile cell having abundant cytoplasm called ooplasm and a large nucleus termed as germinal vesicle.

In double fertilisation, one male gamete fuses with the (i) to form zygote and the other male gamete fuses with (ii) to form primary endosperm nucleus.

Which of the following is / are correct about the process of RNA interference ? (i) This is used to prevent the infestaiton of protozoans. (ii) it takes place in some eukaryotic and all prokaryotic organisms as a method of cellular defense. (iii) The method involves silencing of a specific mRNA due to a complementary dsRNA molecule. (iv) It is novel strategy to produce pest resistant plant

MBD PUBLICATION-MOLECULAR BASIS OF INHERITANCE-QUESTION BANK
  1. A set of three nucleotides that codes for an amino acids.

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  2. A set of three nucleotides on tRNA responsible for attachment of the t...

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  3. RNA molecules formed inside the nucleus of eukaryotes (i.e. prior or m...

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  4. Removal of introns and joining the exons in a definite order in a tran...

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  5. The process of formation of proteins on mRNA.

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  6. Unidirectional flow of information fromDNA toRNA to protein .

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  7. A compound formed by the linking of a molecule of nitrogenous base wit...

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  8. Frederich Griffith discovered the phenomenon called .

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  9. Okazaki fragments are formed on strand of replicating DNA.

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  10. Flow of information from DNA to protein is called .

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  11. Clover leaf structure is shown by .

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  12. The gene whose expression is regulated is gene.

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  13. Termination codons are called Ochre, Amber and .

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  14. Determination of hereditary characters by the DNA is due to the arrang...

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  15. Split geen is seen in .

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  16. The DNA molecule takes a complete turn after every base pairs.

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  17. A nucleotide consists of a a and a nitrogen base.

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  18. The experiment on DNA using.^15N isotope prove that its replication is...

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  19. are the enzymes which unwind DNA.

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  20. New strands of DNA are formed only in the direction.

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