Practice Questions

TLS Online TPP Program

#Question id: 12538

Some global warming models predict that, if permafrost in the tundra regions in the northern hemisphere melts, atmospheric CO2 levels will increase. Which of the following statements best explains this prediction?

#Unit 10. Ecological Principles

The heat released by the melting of the ice on such a vast scale will cause atmospheric CO2 saturation levels to increase.
All of the tundra producers will die if the permafrost melts, and because the tundra regions are vast in the northern hemisphere the tundra plants will not take part in photosynthetic removal of atmospheric CO2
CO2 tied up in the permafrost ice will be released during a thaw.
All of the undecayed organic material would be subject to decomposition following a thaw, which would lead to incredible increase in global cellular respiration, and add to atmospheric CO2

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TLS Online TPP Program

#Question id: 23564

#Unit 8. Inheritance Biology

Match the following

Column I

Column II

A) G-bands

i) viewing the chromosomes under ultraviolet light results from differences in the relative amounts of cytosine–guanine (C–G) and adenine–thymine base pairs

B) R-bands

ii) which are regions of DNA occupied by centromeric heterochromatin

C) Q-bands

iii) staining the telomere DNA specifically

D) C-bands

iv) distinguish areas of DNA that are rich in adenine–thymine (A–T) base pairs

E) T-bands

v) reverting the dark bands by using saltingout method

TLS Online TPP Program

#Question id: 23565

#Unit 8. Inheritance Biology

Sequence rich with cytosine and guanine base pairs only that are detected by