Enable contrast version

Tutor profile: Sam B.

Inactive
Sam B.
Graduate Student in Biomedical Sciences
Tutor Satisfaction Guarantee

Questions

Subject: Biomedical Science

TutorMe
Question:

The brain is protected by the blood brain barrier (BBB) which is impermeable to hydrophilic molecules. Scientists used to treat dopamine related disorders by giving patients dopamine, which had no effect. However, when patients were given L-DOPA (a precursor to dopamine), they had a therapeutic response. We can infer that: A. Both dopamine and L-DOPA are hydrophilic molecules but dopamine is too big to pass through the BBB B. Dopamine is hydrophilic but L-DOPA is hydrophobic C. Lack of L-DOPA is the problem, not dopamine D. None of the above

Inactive
Sam B.
Answer:

B. Dopamine is hydrophilic but L-DOPA is hydrophobic

Subject: Biology

TutorMe
Question:

You are a field biologist that just discovered an unknown organism in a sample you obtained from a nearby swamp. The unknown organism is a single cell, does not have a nucleus and moves around using a single flagella. The organism is most likely a: A. Eukaryote B. Prokaryote C. Non-living D. Virus

Inactive
Sam B.
Answer:

B. Prokaryote

Subject: Algebra

TutorMe
Question:

If the cost of gummy bears in 2000 was $1.50 per bag and the cost of them now (2020) is $3.00 per bag, what is the rate of the price increase assuming a linear slope?

Inactive
Sam B.
Answer:

Because the question is asking for the rate, we need to find the slope of the line between these two points (slope=rate). The year 2000 is the starting point so we can represent that as x=0 with the x-axis measuring time. So, at time 0, the cost of gummy bears is $1.50 so the starting point is (0,1.5). Twenty years later, the cost of gummy bears is $3.00 so our new point is (20,3). To find the slope between these two points, we use the equation M=(y2-y1)/(x2-x1). so, M=(3-1.5)/(20-0)= 1.5/20= 0.075 This means that on average, the cost of gummy bears has gone up by 0.075 cents per year.

Contact tutor

Send a message explaining your
needs and Sam will reply soon.
Contact Sam

Request lesson

Ready now? Request a lesson.
Start Lesson

FAQs

What is a lesson?
A lesson is virtual lesson space on our platform where you and a tutor can communicate. You'll have the option to communicate using video/audio as well as text chat. You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.
How do I begin a lesson?
If the tutor is currently online, you can click the "Start Lesson" button above. If they are offline, you can always send them a message to schedule a lesson.
Who are TutorMe tutors?
Many of our tutors are current college students or recent graduates of top-tier universities like MIT, Harvard and USC. TutorMe has thousands of top-quality tutors available to work with you.