Answer:
True
Explanation:
Hydrochloric acid contributes to the acidic pH in the stomach that inhibits and kills some harmful bacteria that enters the body via the food we ingest. HCL is secreted into the lumen by the parietal cells found in the inner layer of the stomach called the mucosa.
Answer:
Because celery has losen the cell turgidity.
Explanation:
Celery <em>(Apium graveolens) </em>belongs to the family Apiaceae, is a marshland plant. Celery is used as a salad and its extract is used fro the preparation of herbal medicine.
Celery when kept in refrigerator for several days becomes limp as celery lose its water content and become dehydrated. The cell turgidity has been lost and celery wilt.
B. overexposure to radiation
Answer:D
Explanation:
It was Erdwin Chargaff an Austrian biochemist that proposed the base pairing rule. He studied the ratio of purine to pyrimidine nucleotides in different cells and species and concluded that the ratio of purine to pyrimidine is 1:1 from any cell of an organism.
Chargaff rule state that the number of purines is equal to the number of pyrimidines in individuals of the same specie.
Chargaff's base pairing rule Adenine equals thymine and guanine equals cytosine. Always the DNA two strands are complementary to each other. So the adenine of one strand will pair the thymine of the opposite strand, while the quanine will pair with cytosine