Biology - Online Test
Q1. Bt toxin is coded by which gene?
Answer : Option D
Explaination / Solution:
The Bt toxin is encoded by the cry gene. The cry I AC and cry II Ab control cotton boll worms, while the cry I Ab controls corn borer. Bt gene produces Bt toxin. This toxin provides resistance to plants against lepidopteron, coleopteron and dipterans pests.
Q2. In ET technique embryo is transferred into
Answer : Option B
Explaination / Solution:
In ET (embryo transfer) technique, in vitro fertilized embryo is transferred into fallopian tube or uterus for further development.
Q3. Diffusion rate is affected by
Answer : Option B
Explaination / Solution:
Diffusion rates are affected by the gradient of concentration, the permeability of the membrane separating them, temperature and pressure.
Q4. Fibres and fibroblasts are compactly packed in
Answer : Option D
Explaination / Solution:
Dense irregular connective tissue provide strength to body parts. Hence the cells and fibres are packed compactly.
Q5. Which kingdom brought Chlorella and Chlamydomonas with Paramoecium and Amoeba?
Answer : Option C
Explaination / Solution:
Kingdom Protista has brought together Chlamydomonas, Chlorella which were earlier placed in Algae within Plants and (both having cell walls) with Paramoeciumand Amoeba which were earlier placed in the animal kingdom which lack it.
Q6. Adrenal medulla consists of a cluster of _____ nerves and those cells are also known as _____ cells :
Answer : Option C
Explaination / Solution:
Adrenal medulla consists of a cluster of sympathetic nerves and those cells are also known as chromaffin cells. Adrenal medulla is part of the adrenal gland located at the center of the adrenal gland.
Q7. Which of the following statements is/are incorrect:
Answer : Option B
Explaination / Solution:
Inside the human intestine a number of microbes lives that helps in digestion of food and formation of vitaminK. so, human intestine is also an unique habitat.
Q8. The elements involved in delay of flowering if their concentration is low are
Answer : Option D
Explaination / Solution:
Deficiency of N, K, S and Mo causes stunted growth because of inhibition of cell division. Deficiency of N, S and Mo delays flowering.
Q9.
Match the cells and their secretions:
| Cell Type | Secretion |
| a) Goblet cell | i) succusentericus |
| b) Oxyntic cells | ii) mucus |
| c) Chief cells | iii) acid |
| d) Intestinal gland cells | iv) pepsinogen |
Answer : Option B
Explaination / Solution:
The intestinal mucosal epithelium has goblet cells which secrete mucus. The secretions of the brush border cells of the mucosa along with the secretions of the goblet cells constitute the intestinal juice or succusentericus. The peptic or chief cells which secrete the proenzyme pepsinogen. The parietal or oxyntic cells secrete HCl acid.
Q10. Hemozoin is released into blood during the infection of Plasmodium vivax every
Answer : Option C
Explaination / Solution:
Plasmodium vivax protozoa cause malaria in human beings having high fever and chill effect at the regular interval of time. Hemozoin is released in blood stream by plasmodium that cause high fever at the interval of 48 hours.
