<h2>Answer:</h2>
Bt corn is a genetically modified organism that contains a gene of bacteria known as Bacillus thuringiensis.
<h3>Explanation:</h3>
- Bt corn is a type of transgenic crop that contains a gene which produces a crystal-like protein which has an insecticidal effect.
- This gene is present in bacteria. This gene is transferred to the plant by the recombinant DNA technology and genetic engineering.
- This bacterium is a soil bacterium which has no side effects on humans.
- Due to use of this technology, the poisonous chemical insecticides are not used in crop production.
Answer:
Option A
Explanation:
They belong to the same group of the periodic table. This is because their atoms have the same number of electrons in the highest occupied energy level.
Answer: Complementary strand of DNA will be thymine, Guanine,Guanine and cytosine.
Explanation: This is a process called DNA transcription, where DNA makes exact copies of itself during gene expression. DNA unwinds and parent DNA strand will make exact copies of itself resulting in two daughter strands. Complementary base pairs will be formed in a way that adenine pairs with thymine and guanine pairs with cytosine. This reaction is catalysed by DNA polymerase enzyme.
A cell in 1.5% NaCl is in a hypertonic solution .
For a cell to survive in its immediate environment, the movement of fluid is constantly being regulated.
The plasma membrane is selectively permeable and allows water and certain solute molecules to pass through it.
When a surrounding fluid and the cell contents have the same concentration, they are said to be isotonic. Example of such fluid is physiological saline that contains 0.9% NaCl.
When the fluid surrounding the cell is more concentrated (1.5% of NaCl) than the inside of the cell, it is said to be hypertonic.
Therefore the cell in 1.5% NaCl is in a hypertonic solution .
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