A substance that accelerates the rate of a chemical reaction is call a(n)
a) catalyst
b) lipid
c) molecule
d) element
Ans: a) catalyst
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In an exothermic reaction, ____
a. ATP is phosphorylated b. heat energy is absorbed c. the products have less potential energy than the reactants d. the reactants have less potential energy than the products e. H (enthalpy) = 0
Answer the following statements true (T) or false (F)
1) The period between meiosis I and II is termed interkinesis. 2) Crossing-over occurs during prophase I of meiosis. 3) Crossing-over allows the reassortment of linked genes. 4) The region where the homologous chromosomal pairs align is the metaphase plate. 5) Orientation of each chromosomal pair on the spindle axis is random.
The ____ is the developmental origin of the body cavity between the gut and muscles of the body wall
for most protostomes.
a. schizocoelom b. mesoglea c. archenteron d. enterocoelom e. blastopore
Ionic bonds are important in biological structures. Which of the following pairs of molecules would form an ionic bond?
A) two water molecules B) two amino acids with oppositely charged functional groups C) two different stereoisomers of the same sugar D) two phospholipids E) a water molecule and a lipid