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PCR and Restriction Fragment Length Polymorphism are the methods for:
Stems modified into flat green organs performing the functions of leaves are known as?
E. coli cells with a mutated z gene of the lac operon cannot grow in a medium containing only lactose as the source of energy because-
Which experimental material was used by Taylor and colleagues to prove that DNA in chromosomes replicates semiconservatively?
Match List I with List II regarding the lac operon genes and their products: List I (Genes) List II (Products) A. Gene 'a' I. Beta-galactosidase B. Gene 'y' II. Transacetylase C. Gene 'i' III. Permease D. Gene 'z' IV. Repressor protein
Functional megaspore in an angiosperm develops into:
Identify the contraceptive methods A, B, C, D, and E from the list below (corresponding to standard NCERT diagrams): I. Tubectomy II. Vasectomy III. Implants IV. Condoms V. Copper T VI. Cervical caps
Embryo with more than 16 blastomeres formed due to in vitro fertilisation is transferred into:
Given below are two statements: Statement I: DNA polymerases catalyse polymerisation only in one direction, that is 5' →3' Statement II: During replication of DNA, on one strand the replication is continuous while on other strand it is discontinuous. In the light of the above statements, choose the correct answer from the options given below:
Which of the following is not a cloning vector?
If a DNA molecule is shortened by 25 base pairs, how many helical turns will be reduced from its structure?
How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
Persistent nucellus in the seed is known as
During DNA replication, Okazaki fragments are used to elongate:
Forelimbs of cat, lizard used in walking; forelimbs of whale used in swimming and forelimbs of bats used in flying are an example of:
The association of histone H1 with a nucleosome indicates:
Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?
Progesterone alone or in combination with estrogen can also be used as contraceptives by females as injections or implants under their skin. When used in this manner, they:
The length of the DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?
Match List-I with List-II. Choose the correct answer from the options given below.