Class XII · Biology practice
Biotechnology and its Applications MCQs
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494 questions in this collection · Page 19 of 50
Question 181 of 494
📘 CLASS XII
Biotechnology And Its Applications
Important food plants like tomato, banana, and ________ have been produced on a commercial scale using micro-propagation.
Tomato, banana, and apple are examples of plants produced commercially via micro-propagation.
Question 182 of 494
📘 CLASS XII
Biotechnology And Its Applications
Scientists have successfully cultured meristems of banana, sugarcane, and ________ to obtain virus-free plants.
Meristems of banana, sugarcane, and potato have been cultured successfully.
Question 183 of 494
📘 CLASS XII
Biotechnology And Its Applications
The binding of activated Bt toxin to midgut epithelial cells causes cell swelling and ________, leading to insect death.
The activated toxin creates pores causing cell swelling and lysis.
Question 184 of 494
📘 CLASS XII
Biotechnology And Its Applications
The complementary dsRNA molecule in RNAi binds to mRNA, preventing its ________.
dsRNA binds to mRNA, preventing its translation (silencing).
Question 185 of 494
📘 CLASS XII
Biotechnology And Its Applications
One source of the complementary RNA for RNAi could be an infection by viruses having ________ genomes.
Viruses having RNA genomes can be a source of dsRNA that initiates RNAi.
Question 186 of 494
📘 CLASS XII
Biotechnology And Its Applications
Another source of complementary RNA for RNAi are mobile genetic elements (transposons) that replicate via an ________ intermediate.
Transposons replicate via an RNA intermediate, which can be a source of complementary RNA.
Question 187 of 494
📘 CLASS XII
Biotechnology And Its Applications
Transgenic animals are used to study the biological role of factors involved in growth, such as ________-like growth factor.
An example provided is the study of insulin-like growth factor.
Question 188 of 494
📘 CLASS XII
Biotechnology And Its Applications
Transgenic animals are specially made to serve as ________ for human diseases to investigate new treatments.
Transgenic animals serve as models for human diseases.
Question 189 of 494
📘 CLASS XII
Biotechnology And Its Applications
Transgenic animals are made more ________ to toxic substances than non-transgenic animals for faster chemical safety testing.
They are made more sensitive to toxic substances for rapid results in chemical safety testing.
Question 190 of 494
📘 CLASS XII
Biotechnology And Its Applications
Some ________ standards are required to evaluate the morality of all human activities that might help or harm living organisms.
Ethical standards are required to evaluate the morality of human activities regarding living organisms.
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