Enzymes are biological catalysts that enhance the rate of a reaction by:

A) decreasing the activation energy.
B) decreasing the amount of free energy released.
C) increasing the activation energy.
D) increasing the amount of free energy released.
E) increasing the energy of the transition state


Answer: A) decreasing the activation energy.

Biology & Microbiology

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Increases its size after it frees itself from the zona pellucida. _____

A) Human chorionic gonadotropin                                          

B) Zygote                                                                             

C) Chorion                                                                           

D) Morula                                                                            

E) Folic acid                                                                         

F) Fertilization                                                                    

G) Blastocyst

H) Parturition

I) Cleavage

J) Ovulation

K) Placenta

L) Implantation

Biology & Microbiology

Four of the five answers listed below are nonreproductive

parts of a flower. Select the EXCEPTION.

a. calyx b. anther c. corolla d. petal e. sepal

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Meiosis in a diploid organism typically produces _____

a. two diploid cells b. four diploid cells c. four haploid cells d. two haploid cells e. one triploid cell

Biology & Microbiology

In human gene therapy, genes are transferred by

a. viral vectors or lipid clusters b. bacterial cells. c. bacterial plasmids. d. hypodermic injection. e. tissue transplantation.

Biology & Microbiology