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#Question id: 11008


Which of the following events is associated with the first heart sound?

#Unit 7. System Physiology – Animal
  1. Closing of the aortic valve
  2. Inrushing of blood into the ventricles during diastole
  3. Opening of the A-V valves
  4. Closing of the A-V valves

Answer:- Option(s): 4


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TLS Online TPP Program

#Question id: 3891

#Unit 3. Fundamental Processes

Protein amino acid side chains can hydrogen bond in the major groove of DNA, and discriminate between each of the four possible base pairs.  In which one of the following groups of amino acids can all three members potentially be used in such DNA-protein recognition?

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#Question id: 10982

#Unit 7. System Physiology – Animal

If the S-A node discharges at 0.00 seconds, when will the action potential normally arrive at the epicardial surface at the base of the left ventricle?

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#Question id: 9168

#Unit 9. Diversity of Life Forms

Which of the following statements best describes the interaction between fire and ecosystems?

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#Question id: 23831

#Unit 2. Cellular Organization

Which class of myosin is responsible for endocytosis and Membrane association?

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#Question id: 775

#Unit 1. Molecules and their Interaction Relevant to Biology

The formation of microRNA is to:

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