Signal Transduction Pathways and Proteins

Mr. Poser, the AP Bio teacher, discusses changes in signal transduction pathways, focusing on how alterations in reception and transduction can affect cellular responses. He explains the impact of mutations and chemicals on proteins, highlighting the role of p53 in preventing apoptosis and its link to cancer. The video concludes with a discussion on toxins and their effects on cellular pathways, encouraging further exploration of examples.

What is the main focus of the video on changes in signal transduction pathways?

• Genetic inheritance

• Photosynthesis

• Cellular communication

• Cellular respiration

Which of the following can alter the response a cell makes in signal transduction?

• Changes in the weather

• Changes in cell color

• Changes in reception and transduction

• Changes in cell size

What can mutations in receptors, kinases, or phosphatases lead to?

• Decreased cell division

• Increased cell size

• Altered signal transduction pathways

• Enhanced photosynthesis

What can cause a misfolding or mistake in a protein?

• Stable environment

• Regular exercise

• Mutations

• Proper nutrition

How can alterations in the protein p53 affect a cell?

• Increase in photosynthesis

• Prevention of apoptosis

• Decrease in cell size

• Increase in cell color

What is apoptosis?

• Cell growth

• Cell communication

• Programmed cell death

• Cell division

Which protein is associated with preventing apoptosis when altered?

• Kinase

• Phosphatase

• p53

• Receptor

What can certain toxins do to ion channels in cells?

• Enhance their function

• Change their color

• Have no effect

• Mess up their function

What is the role of dendrotoxins in cellular function?

• Increase cell size

• Mess up ion channels

• Enhance photosynthesis

• Decrease cell division

What is the effect of certain chemicals on signal transduction pathways?

• They only inhibit pathways

• They only enhance pathways

• They can inhibit or enhance pathways

• They have no effect