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TLS Online TPP Program

#Question id: 27375

An atom of sodium has an atomic number of 11 and a mass number of 23. Which of the following statements is correct?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. An atom of sodium has 11 protons, 11 electrons, and 11 neutrons.
  2. An atom of sodium has 11 protons, 12 electrons, and 11 neutrons
  3.  An atom of sodium has 11 protons, 11 electrons, and 12 neutrons
  4.  An atom of sodium has 11 protons, 12 electrons, and 12 neutrons.
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TLS Online TPP Program

#Question id: 396

#Unit 1. Molecules and their Interaction Relevant to Biology

Identical heat lamps are arranged to shine on two identical containers, one containing water and one methanol (wood alcohol), so that each liquid absorbs the same amount of energy minute by minute. The covalent bonds of methanol molecules are nonpolar, so there are no hydrogen bonds among methanol molecules. Which of the following graphs correctly describes what will happen to the temperature of the water and the methanol?
TLS Online TPP Program

#Question id: 15735

#Unit 12. Applied Biology

How meristem cultures are able to generate pathogen free plants. Choose the most appropriate statement.
TLS Online TPP Program

#Question id: 9190

#Unit 9. Diversity of Life Forms

What is the probable role of salicylic acid in the defense responses of plants?
TLS Online TPP Program

#Question id: 2624

#Unit 2. Cellular Organization

What is negative regulation of lac operon
TLS Online TPP Program

#Question id: 11080

#Unit 7. System Physiology – Animal

The O2-CO2 diagram here shows a ventilation-perfusion ratio line for the normal lung. Which of the following best describes the effect of decreasing ventilation-perfusion ratio on the alveolar Po2 and Pco2?