Nitrogen-containing bases between two complementary DNA strands are joined by
(a) polar covalent bonds.
(b) hydrogen bonds.
(c) phosphate groups.
(d) deoxyribose sugars.
(b) hydrogen bonds.
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Which line or lines in the graph represent(s) bags that contain a solution that is hypertonic at 50 minutes?
A) A and B B) B C) C D) D E) D and E
Match the following items with the correct phrases.
_______1. In addition to standard precautions, ____________________ must be used when managing a patient with streptococcal pneumonia. _______2. The goal of ____________________ is to render and keep objects and areas sterile. _______3. In addition to standard precautions, ____________________ must be used when managing a tuberculosis patient. _______4. The goal of ____________________ is to reduce the number and transmission of pathogens. _______5. In addition to standard precautions, ____________________ must be used when managing a Clostridium difficile–associated disease. a. airborne precautions b. contact precautions c. droplet precautions d. medical aseptic technique e. surgical aseptic technique
The outer membrane of Gram-negative bacteria
A) is a rigid, protective outer shell. B) is also referred to as endotoxin and stimulates fever and shock. C) is the site of nutrient exchange and allows sizes and shapes of molecules to pass through it. D) has the same chemical composition as the cell membrane.
Why might spinach be more nutritious than iceberg lettuce?
What will be an ideal response?