A pack of cards contains 4 aces, 4 queens and 4 jacks. Two cards are drawn at random. The probability that at least one of them is an ace is

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#Question id: 5682

#Unit 5. Developmental Biology

During prevention of polyspermy in sea urchin the shift from ___1___ to __2____is the result of a small influx of Na+ into the egg through newly opened sodium channels. Sperm cannot fuse with egg cell membranes that have a ___3___ resting potential, so the shift means that no more sperm can fuse to the egg.

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#Question id: 28744

#Unit 2. Cellular Organization

In Peroxisomes, production of hydrogen peroxide by oxidation reactions, these hydrogen peroxide by using catalases oxidize into a variety of other substrates such as____

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#Question id: 5795

#Unit 8. Inheritance Biology

Which characteristic of the genetic code lowers the likelihood of mutation.

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#Question id: 32288

#Unit 2. Cellular Organization

Which of the following contain high concentration of Ca2+-binding proteins?

I. Rough ER

II. Smooth ER

III. Rough microsomes

IV. Smooth microsomes

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#Question id: 11145

#Unit 7. System Physiology – Animal

Two fundamental concepts about the ion channels of a "resting" neuron are that the channels ________.