Very Low Concentrations of Detergent Make Membranes Leaky to Small

question 154

Multiple Choice

Very low concentrations of detergent make membranes leaky to small molecules and ions without damaging proteins. In isolated mitochondria exposed to detergent, the molecules of the electron transport chain and of ATP synthase remain intact. Do you expect ATP synthesis to continue in the presence of low concentrations of detergent?

• A)Yes, because all enzymes and electron carriers are functional.
• B)No, because with a leaky membrane, the proton gradient cannot be maintained.
• C)No, because leaky membranes do not allow NADH and FADH₂ to donate their electrons to the electron transport chain.
• D)No, because leaky membranes inhibit glycolysis.

Distinguish between prezygotic and postzygotic barriers and their significance in speciation.

Describe the process and significance of polyploidy in plant evolution.

Explain the concept of speciation and the conditions that lead to the formation of new species.

Clarify the importance of behavioral isolation and mating signals in reproductive isolation.

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Definitions:

Addictive Disorder

A psychological disorder marked by the inability to resist engaging in behaviors that offer immediate gratification, even when such actions lead to harmful outcomes.

Gambling Disorder

A mental health condition characterized by the inability to control the urge to gamble, leading to significant social, financial, and personal distress.

Gambling Disorder

A behavioral addiction characterized by an uncontrollable urge to gamble, leading to significant personal, social, and financial consequences.

Drug Abuse Prevention

Strategies and methods implemented to prevent the misuse of drugs, aiming to reduce the negative health and social consequences associated with it.