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TLS Online TPP Program

#Question id: 2121

Which of the following membrane activities requires energy from ATP hydrolysis?

#XL - S Microbiology

  1. facilitated diffusion of chloride ions across the membrane through a chloride channel

  2. movement of Na+ ions from a lower concentration in a mammalian cell to a higher concentration in the extracellular fluid

  3. movement of glucose molecules into a bacterial cell from a medium containing a higher concentration of glucose than inside the cell

  4. movement of carbon dioxide out of a paramecium

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TLS Online TPP Program

#Question id: 5751

#XL - R Botany

A biochemical mutant that must be supplied with a particular nutrient for growth would be described as a(n)
TLS Online TPP Program

#Question id: 342

#XL - Q Biochemistry

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by ________.
TLS Online TPP Program

#Question id: 4605

#XL - S Microbiology

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?
TLS Online TPP Program

#Question id: 4591

#XL - S Microbiology

Which of the following factors could cause a surge in population size?
TLS Online TPP Program

#Question id: 11562

#XL - T Zoology

The relationship between the insect hormones ecdysteroid and PTTH is an example of ________.