This set of Agricultural Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Genetic Engineering and Plant Lipids and Storage Proteins”.
1. Lipids are present in plants as storage proteins.
a) True
b) False
View Answer
Explanation: Plant lipids are major components of the human diet and are present in plants as storage oil. Engineered vegetable oils have been tested as field trials. A high stereate phenotype has been engineered in rapeseed by Antisense approach.
2. In ‘Stearoyl-ACP’, what does ACP stand for?
a) Acyl carrier permease
b) Acetate carrier permease
c) Acyl carrier protein
d) Acetate carrier protein
View Answer
Explanation: Stearoyl-ACP desaturase is a chloroplast enzyme which catalyzes the first desaturation step in seed oil biosynthesis, converting Stearoyl-ACP to Oleayl-Acp.
3. Length of fatty acids can be manipulated with _______ enzyme.
a) Cylopropane synthase
b) Thioesterase
c) Dehydro-picolinate synthase
d) Acyl-ACP desaturase
View Answer
Explanation: Thioesterase enzyme is responsible for the accumulation of short chain fatty acids in triglycerides. The gene has been cloned and expressed in developing seed of Arabidopsis, where it caused the accumulation of C12 storage lipids.
4. What is the percentage of methionine present in Brazil nut?
a) 5%
b) 8%
c) 13%
d) 18%
View Answer
Explanation: A heterologous species of sulphur-rich storage protein in Brazil nut containing 18% methionine an 8% cysteine has been expressed in tobacco and rapeseed.
5. What is the modification achieved by acyl-ACP thioesterase engineered enzyme?
a) Increased oleic acid
b) Increased-linolenic acid
c) Lauric acid production
d) Increased Stearic acid
View Answer
Explanation: The source of gene for acyl-ACP thioesterase is California bay. The modification achieved by this enzyme is the Lauric acid production. Antisense of Stearoyl ACP desaturase leads to the increased stearic acid production.
6. Genetic engineering suppresses the expression of anti-nutritional proteins.
a) True
b) False
View Answer
Explanation: Genetic engineering may be carried out in crops by various approaches. It includes the increasing level of a desirable, but little expressed endogenons protein and the expressing of a desirable and heterologous storage protein.
Sanfoundry Global Education & Learning Series – Agricultural Biotechnology
To practice all areas of Agricultural Biotechnology, here is complete set of 1000+ Multiple Choice Questions and Answers.
