Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 30013
TLS Online TPP Program

#Question id: 4133

Which of the following statements about aminoacyl-tRNA synthetases is false?

#Unit 3. Fundamental Processes

  1. Some of the enzymes have an editing/proofreading capability.

  2. The enzyme attaches an amino acid to the 3' end of a tRNA.

  3. The enzyme splits ATP to AMP + PPi.

  4. The enzyme will use any tRNA species, but is highly specific for a given amino acid.

More Questions
TLS Online TPP Program

#Question id: 11330

#Unit 10. Ecological Principles

Bio geographers have noted that the tropics have more terrestrial species than temperate regions. Which of the following is NOT a plausible explanation for this pattern?
TLS Online TPP Program

#Question id: 4391

#Unit 3. Fundamental Processes

What family of proteins plays an essential role in the repression of genes that help to direct the formation of specific tissues and organs in a developing embryo?
TLS Online TPP Program

#Question id: 14480

#Unit 13. Methods in Biology

Probability than a leap year selected at random will have 53 Sundays.
TLS Online TPP Program

#Question id: 382

#Unit 1. Molecules and their Interaction Relevant to Biology

The molar ratio of sodium acetate to acetic acid in a buffer solution with a pH OF 5.76 is 10:1. Assuming the total buffer concentration is 2.2 X 10-2 mol/L, how many grams of sodium acetate (m.w. 82) and how many grams of acetic acid (m.w. 60) should be used in preparing a litre of the solution?
TLS Online TPP Program

#Question id: 11280

#Unit 10. Ecological Principles

Ecosystem services include processes that increase the quality of the abiotic environment. Which of the following processes would fall under this category?