Each of five questions on a multiple-choice examination has four choices, only one of which is correct. The student is attempting to guess the answers. The random variable X is the number of questions answer correctly. Probability that the student will get

Exactly three correct answers

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#Question id: 662

#1. Molecules and their Interaction Relevant to Biology

________ received a Nobel Prize in 1964 for determining the structure of vitamin B12. He/she also solved the structure of penicillin in 1947 and developed many techniques used in the study of large proteins.

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#Question id: 15781

#5. Developmental Biology

Chemical regulation of stem cells takes the form of secreted proteins from surrounding cells that influence stem cell states and progenitor differentiation through endocrine, paracrine, or juxtacrine mechanisms. These signaling factors:

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#Question id: 12742

#13. Methods in Biology

What will happen if too much antigen is present in the Agglutination process?

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#Question id: 8935

#9. Diversity of Life Forms

What may have occurred to prevent species that are of the same grade from also belonging to the same clade?

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#Question id: 11674

#7. System Physiology – Animal

If ATP production in a human kidney was suddenly halted, urine production would: