JB

Justin Bui

University of California - Los Angeles
Swim Instruction

Biography

While not an academic subject, I gained experience with teaching children between the ages of 4-13 how to swim in group lessons. I taught kids how to float, kick, and how to do the four different strokes. This experience taught me to try to be as clear and patient as possible when explaining things to others.

Education

BS Microbiology, Immunology, and Molecular Genetics
University of California - Los Angeles

Educator Statistics

Numerade tutor for 7 years
34 Students Helped

Topics Covered

Exploring the Richness of Plant Diversity: Discover the Beauty of Nature
Exploring Vascular Plant Structure & Development: A Comprehensive Guide
The Fascinating Chemistry of Life: Discovering the Building Blocks
Discover the Power of the Cell: Unleash Your Potential with Our Products
Mastering Metabolism 101: A Beginner's Guide
Unlocking the Secrets of Cell Signaling: Understanding the Intricacies
The Central Dogma: Understanding Gene Expression
Circulation and Gas Exchange: Vital Processes for Optimal Health
The Incredible Power of the Nervous System: Understanding its Functions

Justin's Textbook Answer Videos

02:44
Campbell Biology

Suppose a flower had normal expression of genes $A$ and $C$
and expression of gene $B$ in all four whorls. Based on the ABC
hypothesis, what would be the structure of that flower, starting
at the outermost whorl?
(A) carpel-petal-petal-carpel
(B) petal--carpel-carpel-sepal
(D) sepal-sepal-carpel-sepal

Chapter 35: Vascular Plant Structure, Growth, and Development
Justin Bui
01:41
Biology for AP Courses

Which of the following properties prevents the ligands of cell-surface receptors from entering the cell?
a. The molecules bind to the extracellular domain.
b. The molecules are hydrophilic and cannot penetrate the hydrophobic interior of the plasma membrane.
c. The molecules are attached to transport proteins that deliver them through the bloodstream to target cells.
d. The ligands are able to penetrate the membrane, directly influencing gene expression upon receptor binding.

Chapter 9: Cell Communication
Justin Bui
01:50
Biology for AP Courses

Why are ion channels necessary to transport ions into or out of a cell?
a. Ions are too large to diffuse through the membrane.
b. Ions are charged particles and cannot diffuse through the hydrophobic interior of the membrane.
c. Ions bind to hydrophobic molecules within the ion channels.
d. Ions bind to carrier proteins in the bloodstream, which must be removed before transport into the cell.

Chapter 9: Cell Communication
Justin Bui
01:19
Biology for AP Courses

Aldosterone is a steroid hormone that regulates reabsorption of sodium ions in the kidney tubular cells. What is the probable mechanism of action of aldosterone?
a. It binds gated ion channels and causes a flow of ions in the cell.
b. It binds cell surface receptors and activates synthesis of cAMP.
c. It binds to cell surface receptors and activates a phosphorylation cascade.
d. It binds to an intra cellular receptor and activates gene transcription.

Chapter 9: Cell Communication
Justin Bui
02:26
Biology for AP Courses

Where do DAG and IP3 originate?
a. They are formed by phosphorylation of cAMP.
b. They are ligands expressed by signaling cells.
c. They are hormones that diffuse through the plasma membrane to stimulate protein production.
d. They are the cleavage products of the inositol phospholipid, PIP2.

Chapter 9: Cell Communication
Justin Bui
02:20
Biology for AP Courses

Dopamine is a neurotransmitter in the brain that causes long-term responses in neurons and binds to a G-proteinlinked receptor. Which of the following chemicals would you expect to increase in concentration after dopamine binds its receptor?
a. ATP
b. cAMP
c. calcium ions
d. sodium ions

Chapter 9: Cell Communication
Justin Bui
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