Energetically favorable reactions help cells build biomass
What will be an ideal response?
?G0 reaction = ?Gf0 products- ?Gf0 reactants
Glucose + 6O2 à 6CO2 + 6H2O
?G0 reaction = [(6 × ?Gf0CO2) + (6 × ?Gf0H2O)] - [(?Gf0Glucose) + 6 × (?Gf0O2)]
?G0 reaction = [(6 × -394.4 kJ/mol) + (6 × -237.1 kJ/mol)] - [(-910.4 kJ/mol) + 6 × (0 kJ/mol)] = -2,879 kJ/mol
Oxidation of organic molecules is often an energy-releasing process. Why does oxidation of glucose generate so much more free energy than oxidation of ethanol?
hint: think about the molecular composition of glucose vs. ethanol and how many oxygens are already there
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If the DNA triplets were ATG and CGT, the mRNA codons would be
a. AUG and CGU. b. ATG and CGT. c. UAC and GCA. d. UAG and CGU. e. UAU and GCA.
Organisms capable of producing their own food are known as
a. autotrophs. b. heterotrophs. c. omnivores. d. Herbivores.
You are shown seeds of four different plant species. The largest of these seeds weighs 10 g, and the others weigh 1 g, 100 mg, and 10 mg, respectively. Which of these species has seedlings with the best prospect of surviving under shaded conditions?
A) the plant with 10 g seeds B) the plant with 1 g seeds C) the plant with 100 mg seeds D) the plant with 10 mg seeds
Which of the following would limit your possible exposure to the Lassa virus?
A) using insect repellant B) not eating bushmeat C) keeping a rodent-free home D) avoiding sexual intercourse E) not eating anything that hasn't been well cooked