1. ASSERTION : When gel electrophoresis is performed, the smallest segment is found near positive electrode. REASON : DNA is negatively charged molecule.
Correct!
Wrong!
2. ASSERTION : Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with the roots of all cereal and pulse crops. REASON : A gene incorporated in the bacterial chromosomal genome gets automatically transferred to the crop with which the bacterium is associated.
Correct!
Wrong!
3. ASSERTION : YAC vectors have been exploited extensively in mapping the large genomes. REASON : YAC vectors have a composite structure made of bacteriophage and plasmid.
Correct!
Wrong!
4. ASSERTION : Myasthenia gravis is an autoimmune disease resulting in muscular weakness and fatigue. REASON : Vaccination using B cells is the most effective means of treating autoimmune diseases.
Correct!
Wrong!
5. ASSERTION : Hardy-Weinberg principle states that in the absence of disturbing influences, gene frequencies of large populations of sexually reproducing organisms do not change, provided that matings, occur at random. REASON : The disturbing influences include mutation, gene flow, genetic drift, genetic recombination and natural selection.
Correct!
Wrong!
6. ASSERTION : To prepare chromosome map of human, restriction fragment length polymorphism (RFLP) is done. REASON : RFLP is the occurrence of different lengths of DNA sequences cleaved at restriction sites.
Correct!
Wrong!
7. ASSERTION : Only a boy child could be born with a substitution of glutamic acid by valine on 6th codon of β-chain of haemoglobin. REASON : The gene for mutation causing sickle - cell anaemia is found on Y-chromosome.
Correct!
Wrong!
8. ASSERTION : Now-a-days amniocentesis is banned. REASON : Amniocentesis gives the information of any abnormality in the fetus and many other complications regarding pregnancy can be detected.
Correct!
Wrong!
9. ASSERTION : The Krebs cycle is poisoned by malonate. REASON : Malonate decreases oxaloacetate concentration.
Correct!
Wrong!
10. ASSERTION : All proteinaceous enzymes have a three-dimensional structure. REASON : The secondary structure of protein is according to amino acid present inside the polypeptides.
Correct!
Wrong!
BIOLOGY DAY-9
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