What is the original source of new alleles?
a. crossing over
b. independent assortment
c. fertilization
d. mutation
e. mitosis
ANSWER: d
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In general, a cell receiving a message undergoes three stages of cell signaling. What are these stages?
a. paracrine, autocrine, and local b. signal reception, signal transduction, and cellular response c. signal reception, nucleus disintegration, and apoptosis d. signal reception, cellular response, and cell division e. the alpha, beta, and gamma
According to the latest research, which of the following best describes the first eukaryote?
a. It lacked a nucleus, a mitochondrion, or a chloroplast. b. It lacked a nucleus, but contained a mitochondrion and a chloroplast. c. It contained a nucleus and a chloroplast, but not a mitochondrion. d. It contained a nucleus and a mitochondrion, but not a chloroplast. e. It contained a nucleus, a mitochondrion, and a chloroplast.
Alcohols are more effective at inactivating enveloped viruses than naked viruses.
Answer the following statement true (T) or false (F)
What is the difference between a point mutation and a chromosomal aberration?
A. Both are mutation types, but in a point mutation, the mutation occurs at a specific point anywhere on the chromosome. In a chromosomal aberration, the mutation is all throughout the chromosome. B. Both are mutation types, but in a point mutation, one base pair is changed, and in a chromosomal aberration, an entire section of the chromosome is altered. C. A chromosomal aberration is caused by DNA damage, while a point mutation is a mutation of a single base. D. A chromosomal aberration is an all-inclusive term for any DNA mutation, and a point mutation is a type of aberration. E. Point mutations occur at a specific point due to sunlight, whereas chromosomal aberrations can occur anywhere due to any type of DNA damage.