All Free Biology MCQs with Answers
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19844 questions · page 539 of 1985
5381. Millions of artificial seed are produced in large tanks called:
- A. Thermocycler
- B. Biopole
- C. Bioreactors
- D. None of the above
Explanation: Bioreactors are vessels that have been designed and produced to provide an effective environment for enzymes or whole cells to transform biochemicals into products. In some cases, inactivation of cells or sterilization is carried out in the bioreactor such as in water treatment. It is possible to produce millions of somatic embryos at once in large tanks called bioreactors. This is done for certain vegetables like tomato, celery, asparagus and for ornamental plants like lilies, begonias and African violets.
Correct answer: Bioreactors5382. The artificial seeds are produced by which of the following plants?
- A. Corn
- B. Tomato
- C. Mango
- D. Roses
Explanation: It is possible to produce millions of somatic embryos at once in large tanks called bioreactors. This is done for certain vegetables like tomato, celery, asparagus and for ornamental plants like lilies, begonias and African violets.
Correct answer: Tomato5383. The particle gun is used to bombard the:
- A. Callus
- B. Seedling
- C. Clonal
- D. Somaclonal
Explanation: The particle gun, that bombards a callus with DNA coated microscopic metal particles. Then genetically altered somatic embryos develop into genetically adult plants. Many plants including com and wheat varieties have been genetically engineered by this method.
Correct answer: Callus5384. Which of the following is cold resistant plant?
- A. Wheat
- B. Canola
- C. Cotton
- D. Rice
Explanation: The large number of QTLs identified suggests that cold tolerance in rice expressed at both germination and booting is quantitatively inherited and controlled by many genes. In these bi-parental populations, the majority of QTLs associated with cold tolerance were derived from a JAPONICA parent
Correct answer: Rice5385. Which of the following is drought tolerant plant?
- A. Wheat
- B. Canola
- C. Cotton
- D. Sugarcane
Explanation: Drought tolerant crops includes cereals, rice, sugarcane.
Correct answer: Sugarcane5386. Herbicide resistant plant is:
- A. Corn
- B. Canola
- C. Cotton
- D. Sugarcane
Explanation: Herbicide-resistant plants are Wheat, rice, sugar beets, canola.
Correct answer: Canola5387. Monosaturated oleic acid is produced from:
- A. Mustard
- B. Soya bean
- C. Cotton
- D. Sunflower
Explanation: Soybeans have been developed that mainly produce the monounsaturated fatty acid, oleic acid, a change that may improve human health.
Correct answer: Soya bean5388. Which of the following compounds is used for hardening the paints and plastics?
- A. Oleic acid
- B. Palmitic acid
- C. Vernolic acid
- D. None of the above
Explanation: These altered plants also produce vernolic acid and ricinoleic acid, derivatives of oleic acid that can be used as hardenes in paints and plastics. The necessary genes were derived from Vemonia and castor bean seeds and were transferred into the soybean genomes.
Correct answer: Vernolic acid5389. The genes of vernolic acid were derived from:
- A. Mustard
- B. Soybean
- C. Castor bean
- D. Sunflower
Explanation: These altered plants also produce vernolic acid and ricinoleic acid, derivatives of oleic acid that can be used as hardenes in paints and plastics. The necessary genes were derived from Vemonia and castor bean seeds and were transferred into the soybean genomes.
Correct answer: Castor bean5390. Amino acid contents are improved in:
- A. Mustard
- B. Soybean
- C. Cotton
- D. Sunflower
Explanation: Amino acid contents are improved in Corn, soybean
Correct answer: Soybean