How can the enzymes increase the rate of a biochemical reaction?

a. increase entropy and enthalpy
b. denature the reactants
c. decrease the concentration of reactants
d. lower the energy of activation
e. lower the free energy of the process


Answer: d. lower the energy of activation

Biology & Microbiology

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Which phenotypes are parental?

In Drosophila, the autosomal recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild-type flies have brick-red eyes). Flies who are homozygous recessive at both pr and cn have orange eyes. A female who has wild-type eyes is crossed to an orange-eyed male. Their progeny have the following distribution of eye colors:



A) wild-type and orange
B) brown and bright-red
C) wild-type and brown
D) bright-red and orange
E) There is no way to determine this.

Biology & Microbiology

In terms of structure, most leaves are _______________, with a high _______________ to _______________ ratio

Fill in the blank(s) with correct word

Biology & Microbiology

The naming system developed by Linnaeus is called:

a. clamadics b. phylogeny c. binomial nomenclature

Biology & Microbiology

Which of the following characteristics does NOT distinguish the archaea from the bacteria?

A) the types of transfer RNA used B) the rRNA sequences present C) the deoxyribonucleotides D) cell wall composition E) cell membrane composition

Biology & Microbiology