Answer the following question given this paragraph: Some people have low levels of the neurotransmitter called serotonin in their brain. Scientists think that this is one cause of depression. Medications called antidepressants help bring serotonin levels back to normal. For many people with depression, antidepressants control the symptoms of their depression and help them lead happy, productive lives. Q: What according to scientists is the major cause of depression? A:
OPTIONS:
- low thyroid levels
- high fat diets
- high serotonin levels
- low serotonin levels
low serotonin levels

Answer the following question given this paragraph: Hair and nails are made of keratin, a tough protein. Q: Hair and nails are made of what? A:
OPTIONS:
- chromatin
- proteins
- cellulose
- keratin

Answer: keratin

Question: Answer the following question given this paragraph: Dietary proteins are broken down during digestion to provide the amino acids needed for protein synthesis. Any extra proteins in the diet not needed for this purpose are used for energy or stored as fat. One gram of proteins provides 4 Calories of energy. Eating protein provides the amino acids for your cells to produce your own antibodies, muscle fibers and enzymes (as well as many other types of proteins). Q: What are broken down during digestion to provide the amino acids needed for protein synthesis? A:
OPTIONS:
- sugars
- carbohydrates
- metabolytes
- dietary proteins
Answer: dietary proteins

input with options: Answer the following question given this paragraph: After the blood in the pulmonary capillaries becomes saturated with oxygen, it leaves the lungs and travels to the heart. The heart pumps the oxygen-rich blood into arteries, which carry it throughout the body. Eventually, the blood travels into capillaries that supply body tissues. These capillaries are called peripheral capillaries . Q: After the blood in the pulmonary capillaries becomes saturated with oxygen, it leaves the lungs and travels where? A:
OPTIONS:
- to the lungs
- to the kidneys
- to the brain
- to the heart
output: to the heart

Q: Answer the following question given this paragraph: An amide bond joining two amino acid units is called a peptide bond. Note that the product molecule still has a reactive amino group on the left and a reactive carboxyl. Q: An amide bond joining two amino acid units is called a what? A:

OPTIONS:
- carboxyl bond
- ammonia bond
- precipitate bond
- peptide bond

A: peptide bond

Answer the following question given this paragraph: Gyroscopes used in guidance systems to indicate directions in space must have an angular momentum that does not change in direction. Yet they are often subjected to large forces and accelerations. How can the direction of their angular momentum be constant when they are accelerated?. Q: What instruments used in guidance systems to indicate directions in space must have an angular momentum that does not change in direction? A:
OPTIONS:
- actuators
- elevators
- magnets
- gyroscopes
gyroscopes