Answer:
Radiation, chemical, and infectious agents are mutagens or environmental factors that can cause a mutation
Explanation:
Mutagens are agents that can interfere with DNA and cause a mutation. They can cause chemical changes, structural changes or breakages that end up altering the sequence of the DNA. This results in mutations which can cause diseases such as cancer.
To protect the cell and to let certain things go in and out of the cell
Answer:
5ʹ-ATTCCGGATCGA-3ʹ
Explanation:
In a double-stranded DNA, two strands are held together with the help of hydrogen bonds between nitrogenous bases and the two strands are anti-parallel, means one strands runs in 5' to 3' direction, while another strand runs in 3' to 5' direction.
According to complementary base pairing rule, adenine makes bonds with thymine and thymine makes bond with adenine; similarly, guanine makes bonds with cytosine and cytosine makes bonds with guanine.
Thus, the complementary base pairing rule, complementary sequence for given DNA sequence would be:
5ʹ-TCGATCCGGAAT-3ʹ
3ʹ-AGCTAGGCCTTA-5ʹ, which can be also written as
5ʹ-ATTCCGGATCGA-3ʹ.
Thus, the correct answer is 'second option.'
Q. Name the type of membrane channel that opens in response to chemical binding and is found in dendrites of some sensory receptors like pain receptors, and in the dendrites and cell bodies of interneurons and motor neurons.
A. Ligand-Gated Channels
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Explanation:
Darwinism is a theory of biological evolutiondeveloped by the English naturalist Charles Darwin(1809–1882) and others, stating that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.
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