Which nitrogenous base is present in DNA but not RNA?

A) adenine
B) cytosine
C) guanine
D) uracil
E) thymine

Which type of membrane lines joint cavities?

A) Serous
B) Mucous
C) Synovial
D) Gobletal
E) Cutaneous

Gaps or interruptions in the myelin sheath are called ________.

A) internodes
B) tight junctions
C) neurofilaments
D) nodes of Ranvier
E) gap junctions

Which of the following statements about tropical rain forests is/are true?

A) Ranchers only temporarily benefit from deforestation.
B) People are settling in tropical rain forests due to road construction.
C) Humans remove vegetation for fuel or to feed animals.
D) Destruction of rain forests can lead to desertification.
E) All of the answer choices about tropical rain forests are true.

The leading strand of DNA is formed as

A) short segments called Okazaki fragments.
B) a continuous strand, adding to the 3´ end.
C) a continuous strand, adding to the 5´ end.
D) a template.
E) soon as the lagging strand is formed.

What is the correct order an excreted water molecule moves from glomerulus to collecting duct?

A) loop of nephron → glomerular capsule → proximal convoluted tubule → distal convoluted tubule
B) glomerular capsule → proximal convoluted tubule → loop of nephron → distal convoluted tubule
C) glomerular capsule → proximal convoluted tubule → distal convoluted tubule → loop of nephron
D) proximal convoluted tubule → glomerular capsule → loop of nephron → distal convoluted tubule
E) distal convoluted tubule → glomerular capsule → proximal convoluted tubule → loop of nephron