Which of the following types of molecules are the major structural components of the cell membrane?
A) phospholipids and cellulose
B) nucleic acids and proteins
C) phospholipids and proteins
D) proteins and cellulose
E) glycoproteins and cholesterol
Answer: C
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Island species are particularly vulnerable to extinction for all of the following reasons except
A. humans have altered habitats. B. island species have lost the ability to escape predators. C. humans have introduced competitors. D. humans have introduced diseases. E. fewer endemic species are found on islands.
Elaborate on why discovering endospores was important to microbiology
What will be an ideal response?
This photo shows early frog embryos, each a product of three mitotic divisions of the nucleus of one fertilized egg. How many nuclei does each of these embryos contain?
1.2
2.4
3.8
4.16
The transcribed, but not translated, sequence that is immediately upstream of the region that encodes the functional product is called the ________ region.
A. promoter B. leader C. trailer D. coding