Practice Questions

TLS Online TPP Program

#Question id: 4605

Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?

#SCPH28 | Zoology

Natural selection cannot account for losses, but accounts only for new structures and functions.
Natural selection accounts for these losses by the principle of use and disuse.
Under particular circumstances that persisted for long periods, each of these structures presented greater costs than benefits.
The ancestors of these organisms experienced harmful mutations that forced them to lose these structures.

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TLS Online TPP Program

#Question id: 576

#SCPH05 I Biotechnology

The hydrophobic cleft in globular proteins which bind substrate molecules is called the ________.

TLS Online TPP Program

#Question id: 577

#I Life Science/ Life Sciences Group – I-V

Most of the known enzymes are ________.

TLS Online TPP Program

#Question id: 577

#SCPH05 I Biotechnology

Most of the known enzymes are ________.

TLS Online TPP Program

#Question id: 578

#I Life Science/ Life Sciences Group – I-V

An enzyme that catalyzes conversions of L-sugars to D-sugars is called a/an ________.

TLS Online TPP Program

#Question id: 578

#SCPH05 I Biotechnology

An enzyme that catalyzes conversions of L-sugars to D-sugars is called a/an ________.

TLS Online TPP Program

#Question id: 579

#I Life Science/ Life Sciences Group – I-V

Oxidases, peroxidases, oxygenases or reductases are all