A nuclear envelope has four of the following characteristics. Which is the exception?
a. single lipid bilayer
b. continuous with endoplasmic reticulum
c. possesses pores
d. controls passage of substances into and out of nucleus
e. separates DNA from cytoplasm
ANSWER: a
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Sediments that are formed from seawater as a result of a variety of chemical processes are called:
a. cosmogenous. b. hydrogenous. c. organic.. d. biogenous. e. terrigenous.
You have a freshly prepared 0.1 M sucrose (molecular mass 342) solution, which means ________.
A) 6.02 × 1023 of sucrose molecules are present in the solution B) 6.02 × 1022 of sucrose molecules are present in the solution C) 34.2 g of sucrose is present in the solution D) 6.02 × 1022 of sucrose molecules or 34.2 g of sucrose is present in the solution
The predominant bacterial species that colonizes the human skin is
A. Staphylococcus epidermidis. B. Bacterioides fragilis. C. Candida albicans. D. Lactobacillus. E. Streptococcus pneumoniae.
What is the structure and function of steroid receptors?
What will be an ideal response?