Which of the following choices is an important function of lipids?
a. energy storage
b. insulation
c. all of the choices
d. cell membrane construction
c
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If an mRNA carries AUCGUG as a sequence,
what would be the sequence of the DNA complement to the sequence of DNA that is the complement to the mRNA?
a. ATCGTG b. TCGCAC c. CGATCT d. GCTACA e. UAGCAC
Which of these lists contains the four postulates of natural selection?
A. Variation in population, heritable variation, selection, unlimited survival and reproduction B. Uniform population, heritable traits, selection, differential survival or reproduction C. Variation in population, environmental variation, selection, differential survival or reproduction D. Variation in population, heritable variation, selection, differential survival or reproduction
Gram-negative bacteria are characterized by the presence of a gram-negative envelope. Which of the following are components of this envelope?
A) The plasma membrane, outer membrane and periplasm. B) The plasma membrane and the outer membrane, peptidoglycan layer and periplasm. C) The outer membrane, peptidoglycan and periplasm. D) The plasma membrane, peptidoglycan and the outer membrane.
Consider a cell in which nondisjunction occurs for all chromosomes during meiosis I. What would be the result of this event?
A. four aneuploid gametes B. two haploid gametes and two polyploidgametes C. two haploid gametes and one aneuploid gamete with an extra set of chromosomes D. four haploid gametes E. two aneuploid gametes, each with an extra set of chromosomes