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PilotLPTM [1.2K]
3 years ago
7

How many different codons can code for the amino acid tryptophan (Trp)? A) 1 B) 3 C) 4 D) 6

Biology
2 answers:
Brut [27]3 years ago
7 0

The answer is A. 1 ...............................

sergij07 [2.7K]3 years ago
6 0
May be 3
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Which of the following describes qualitative data?
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It would be the second choice (Measuring the volume of an object by water displacement).

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Qualitative is defined as relating to, measuring, or measured by the quality of something rather than its quantity. Therefore the second choice is the best option.

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How is enthalpy used to predict whether a reaction is endothermic or exothermic?
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<u>Answer:</u>

<em>329.48 KJ/mol heat is released by the combustion of 2 molof methane</em>

<u>Explanation:</u>

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

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\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]

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                            = -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]

                           = -787 KJ/mol+1116.48 KJ/mol

                                          =329.48 KJ/mol

<em>In this question, </em><em>the enthalpy of formation</em><em> has positive value and hence the </em><em>reaction is endothermic</em><em> in which the heat is released. </em>

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3 years ago
R-related species have a short life span and an early reproduction cycle? t or f
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