TLS Online TPP Program

#Question id: 2413


 Decoration of actin filaments with myosin S1 is commonly used to:

#Unit 2. Cellular Organization
  1. attach actin filaments to cell membranes.

  2. disassemble actin filaments.

  3. reveal the polarity of actin filaments.

  4. reveal the polarity of myosin filaments.

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TLS Online TPP Program

#Question id: 9584

#Unit 7. System Physiology – Animal

In given Relationship of oxygen production to flash energy, the first evidence for the interaction between the antenna pigments and the reaction centre, What conclusion can be drawn about based on graph;


a.) several hundred pigments are associated with each reaction centre and that each reaction centre must operate four times to produce 1 molecule of oxygen—hence the value of 2500 chlorophylls per O2

b.) low light intensity of the curve, an increase in the number of photons stimulates a proportional increase in oxygen evolution. Thus, the slope of the curve measures the quantum yield for oxygen production

c.) The quantum yield for a particular process can range from 0 →if that process does not respond to light to 1.0→if every photon absorbed contributes to the process by forming a product

d.) O2 require more than a single photochemical event to be formed, and therefore have a lower quantum yield of formation than the photochemical quantum yield. It takes about ten photons to produce one molecule of O2, so the quantum yield of O2 production is about 0.1

Which of the following statements would be correct relates with graph?

TLS Online TPP Program

#Question id: 12604

#Unit 10. Ecological Principles

Which of the following ecosystems would likely have a larger net primary productivity/hectare? 

TLS Online TPP Program

#Question id: 2296

#Unit 2. Cellular Organization

Small metabolites, such as sugar and ions, pass between plant cells via _______

TLS Online TPP Program

#Question id: 1614

#Unit 4. Cell Communication and Cell Signaling

The membrane attack complex consists of:

TLS Online TPP Program

#Question id: 5615

#Unit 5. Developmental Biology

The fast block to polyspermy is achieved by: