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Cell Signaling and Disease Development Quiz

10 Questions

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Cell Signaling and Disease Development Quiz

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Questions and Answers

How do cells interact physically through direct contact?

By directly touching each other (correct)

By releasing specific receptors into the environment

By secreting ligands that bind to receptors

Through GPCRs that transmit signals to the nucleus

What triggers a cascade of intracellular events known as signal transduction?

Inhibition of protein kinase cascades

Binding of ligands to receptors (correct)

Activation of G proteins by secreted molecules

Direct contact between target cells

How do GPCRs activate intracellular signaling pathways?

By directly modifying gene expression

Through interaction with G proteins (correct)

By inducing protein kinase cascades

By binding to secreted ligands

What is the role of CED-9 in the PCD pathway of C.elegans?

Prevents cell death by keeping CED-4 bound and inactive Signup and view all the answers

Which key proteins are involved in the PCD pathway in C.elegans?

CED-4 and CED-9 Signup and view all the answers

What did Sydney Brenner, H.Robert Horvitz, and John E.Sulston receive the Nobel Prize for?

Discoveries concerning genetic regulation of organ development and programmed cell death Signup and view all the answers

Which ion plays a crucial role in muscle contraction by binding to troponin and tropomyosin?

Calcium ions Signup and view all the answers

What happens when calcium ions are released from the sarcoplasmic reticulum?

They bind to troponin and cause a conformational change in tropomyosin Signup and view all the answers

What is the role of presynaptic terminals in neurons?

Releasing neurotransmitters Signup and view all the answers

Why is understanding neurons crucial for understanding the nervous system?

Neurons transmit information in the nervous system Signup and view all the answers