The correctly punctuated sentence is:
a. Let's meet at Sarah's house after school.
This option correctly uses the contraction "Let's" and the possessive form "Sarah's."
ATP synthesis through a combination of electrochemical and osmotic events is known as oxidative phosphorylation.
It occurs in the mitochondria during the electron transport chain where a proton gradient is used to drive the synthesis of ATP.
The complete sentence would be: "Do you usually take a bus to the market?"
The preposition "to" indicates direction or a destination.
In this case, it shows that the market is the destination you are traveling to.
Prostaglandins in semen facilitate the transport of sperm.
Gastrin stimulates the secretion of gastric juice, aiding in digestion.
Waxes are esters of long-chain fatty acids and long-chain alcohols.
They are typically solid at room temperature and found in nature as protective coatings on plants and animals.
A vendor is a person or business that sells goods and services to customers.
During crossing over in meiosis I, homologous chromosomes exchange different segments, leading to genetic recombination and increased variation.
The optimum pH for pancreatic lipase is around 8.
Pancreatic lipase works best in slightly alkaline conditions, which is the environment of the small intestine where it aids in the digestion of fats
The correct version should be: "She enjoys reading, writing, and painting."
The gerund form ("painting") should be used to maintain a parallel structure with "reading" and "writing."