Identify the statements which are not true with respect to transgenic animals?
(A) Transgenic mice are used to test the safety of polio vaccine.
(B) Transgenic animals are less sensitive to toxic substance than normal animals.
(C) The milk produced by the first transgenic cow contain human \(β\)-lactalbumin.
(D) Transgenic animals can produce useful biological products.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (B) and (C) only
(A) Transgenic mice are used to test the safety of polio vaccine. — True.
(B) Transgenic animals are less sensitive to toxic substance than normal animals. — Not true. They are made more sensitive to toxic substances.
(C) The milk produced by the first transgenic cow contain human \(β\)-lactalbumin. — Not true. Rosie’s milk contained human alpha-lactalbumin.
(D) Transgenic animals can produce useful biological products. — True.
NCERT Extract:
Transgenic Animals – “… Similar attempts are being made for treatment of phenylketonuria (PKU) and cystic fibrosis. In 1997, the first transgenic cow, Rosie, produced human protein-enriched milk (2.4 grams per litre). The milk contained the human alpha-lactalbumin and was nutritionally a more balanced product for human babies than natural cow-milk.”
Transgenic Animals – “… Transgenic mice are being used to test the safety of the polio vaccine.”
Transgenic Animals – “… Transgenic animals are made that carry genes which make them more sensitive to toxic substances than non-transgenic animals.”