Which type of lipids are the most abundant in the plasma membrane?
(a) phospholipids
(b) glycolipids
(c) sterols
(d) triacylglycerides
(a)
You might also like to view...
Key sequences exist within promoters, which vary somewhat among various promoters but are sufficiently constant that they can be represented by a sequence of bases most often found at each position. These representations are called ________ sequences.
A. convergence B. consensus C. idealized D. common
Species formation among alpine buttercups in New Zealand was promoted by
A. mechanical isolation. B. gametic isolation. C. periodic isolation by glaciation. D. geographical isolation. E. temporal isolation.
You are examining the DNA sequences that code for the enzyme phosphofructokinase in skinks and Komodo dragons
You notice that the coding sequence that actually directs the sequence of amino acids in the enzyme is very similar in the two organisms but that the surrounding sequences vary quite a bit. What is the most likely explanation for this? (a) Coding sequences are repaired more efficiently. (b) Coding sequences are replicated more accurately. (c) Coding sequences are packaged more tightly in the chromosomes to protect them from DNA damage. (d) Mutations in coding sequences are more likely to be deleterious to the organism than mutations in noncoding sequences.
The embryo develops from cells of the
a. blastocyst outer layers. b. blastocyst inner cell mass. c. gastrula mesoderm. d. gastrula ectoderm. e. gastrula endoderm