Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 65323
TLS Online TPP Program

#Question id: 40103

Q. Weathering differs from erosion because weathering:
 

#Environmental Science
  1.  Transports materials
  2.  Deposits sediments
  3.  Breaks rocks in situ
  4. Occurs only by wind
More Questions
TLS Online TPP Program

#Question id: 40214

#Applied Microbiology

Which of the following represents the correct sequence of temperature changes during one single cycle of PCR amplification? 
TLS Online TPP Program

#Question id: 40215

#Environmental Science

Match the geological eons/events in List I with the biological milestones in List II.

List I (Time Period/Event)List II (Biological Milestone)
A. 4.0 - 3.8 Billion years agoI. Appearance of first Eukaryotes
B. 3.5 Billion years agoII. Oxygen Revolution (Great Oxidation Event)
C. 2.7 - 2.5 Billion years agoIII. Appearance of first cellular life (Prokaryotes)
D. 2.0 - 1.5 Billion years agoIV. Formation of life precursors (RNA/Protocells)
TLS Online TPP Program

#Question id: 40216

#Environmental Science

Given below are two statements regarding the Miller-Urey experiment:
Statement I: The experiment used a mixture of Methane (CH4), Ammonia (NH3), Hydrogen (H2), and Water vapor (H2O) exposed to electric discharge.
Statement II: The experiment successfully synthesized complex nucleic acids (DNA chains) within the first week.
In light of the above statements, choose the most appropriate answer:
TLS Online TPP Program

#Question id: 40217

#Environmental Science

Consider the following statements about the Endosymbiotic Theory:

Statement I: It explains the origin of mitochondria and chloroplasts in eukaryotic cells.

Statement II: Mitochondria and chloroplasts have their own circular DNA, similar to bacteria.

Statement III: The theory proposes that these organelles originated as free-living prokaryotes that were engulfed by a host cell.

Which of the statements given above are correct?
TLS Online TPP Program

#Question id: 40218

#Environmental Science

Match the concepts/experiments in List I with the scientists in List II.

List I (Concept/Experiment)List II (Scientist)
A. Hot Dilute Soup (Prebiotic Soup)I. Francesco Redi
B. Panspermia (Cosmozoic Theory)II. J.B.S. Haldane
C. Maggots in decaying meat experimentIII. Richter & Arrhenius
D. Omne vivum ex vivo (Biogenesis)IV. Louis Pasteur
TLS Online TPP Program

#Question id: 40219

#Environmental Science

Match the evolutionary stages in List I with their defining characteristics in List II

List I (Evolutionary Stage)List II (Characteristics)
A. ChemoheterotrophsI. First oxygen-producing photosynthesizers (Cyanobacteria)
B. ChemoautotrophsII. Earliest life forms; absorbed organic molecules from the environment
C. Photoautotrophs (Anoxygenic)III. Synthesized food using chemical energy (inorganic substrates)
D. Photoautotrophs (Oxygenic)IV. Used sunlight but H2S instead of water; did not release Oxygen