Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 6479
TLS Online TPP Program

#Question id: 9168

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

#Unit 9. Diversity of Life Forms

  1. The likelihood of a wildfire occurring in a given ecosystem is highly predictable over the short term.

  2. Many kinds of plants and plant communities have adapted to frequent fires.

  3. The suppression of forest fires by humans has prevented certain communities, such as grasslands, from reaching their climax stage.

  4. Chaparral communities have evolved to the extent that they rarely burn
More Questions
TLS Online TPP Program

#Question id: 12910

#Unit 13. Methods in Biology

Match the following:
A. RNA analysis               i. Sexing or cell mutation sites               a. Expressed Sequence tag
B. Forensic science           ii. mRNA analysis                                     b.  Analysis of DNA from blood
C. Gene discovery              iii. DNA profiling                                       c. Active latent viral infections
D. Single-cell analysis     iv.  RT–PCR                                             d. Sex determination of unborn
TLS Online TPP Program

#Question id: 12911

#Unit 13. Methods in Biology

Match the following:
A. DNA polymerases              i. Alkaline phosphatase        a.RNA-dependent DNA polymerase, used in cDNA synthesis
B. Reverse transcriptase        ii. T4 DNA ligase                    b. Thermostable DNA polymerase used in PCR
C. Ligases                                 iii.  AMV-RT                            c. Removes 5′-phosphates from DNA and RNA
D. Phosphatases                     iv. Taq DNA pol                      d. Links 5′-phosphate and 3′-hydroxyl ends via phosphodiester bond
TLS Online TPP Program

#Question id: 12912

#Unit 13. Methods in Biology

Name the enzyme which separates the double-helical DNA into single strands.
TLS Online TPP Program

#Question id: 12913

#Unit 13. Methods in Biology

________  involves the size analysis of restriction fragments produced by several restriction enzymes individually and in combination. 
TLS Online TPP Program

#Question id: 12914

#Unit 13. Methods in Biology

 In Electrophoresis of DNA the gel is first soaked in the alkali then it is transferred to the membrane so that the ________
TLS Online TPP Program

#Question id: 12915

#Unit 13. Methods in Biology

Which of the following statement is not correct about PCR.