MCQs
Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.
Correct answer
C. All of these
Explanation
The three organelles that contain DNA are the nucleus, mitochondria and chloroplasts. Organelles are membrane-bound subunits within a cell — analogous to organs in the body — that perform specific functions. The nucleus is the control center of the cell, and houses genetic information. The mitochondria and chloroplasts both produce energy, in animal and plant cells, respectively.
Correct answer
B. Sclerenchymatous
Explanation
Sclerenchymatous is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Rhabdovirus
Explanation
Rhabdovirus is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. Both b and c
Explanation
Both b and c is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Skin
Explanation
The first heaviest organ is the skin with a mass of four to five kg. The liver is the second heaviest organ in the body, which discharges bile. The weight of the liver is about 1.5 kg. The brain is the third heaviest organ with an approximate mass of 1.5 kg.
Correct answer
D. Polio virus
Explanation
Polio virus is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. Haustoria
Explanation
Haustoria is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Skin
Explanation
Skin is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. seed plants
Explanation
seed plants is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Insects
Explanation
Insects is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.