Which of the following statements describes chromatin?
A) Heterochromatin is composed of DNA, whereas euchromatin is made of DNA and RNA.
B) Both heterochromatin and euchromatin are found in the cytoplasm.
C) Heterochromatin is highly condensed, whereas euchromatin is less compact.
D) Euchromatin is not transcribed, whereas heterochromatin is transcribed.
C
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What type of medium has a composition that is chemically defined?
A) synthetic B) nonsynthetic C) complex D) infusion
In the TCA cycle, two carbons are removed from citric acid in the form of ________, thereby regenerating oxaloacetate to complete the cycle.
A. acetyl-CoA B. methanol C. carbon dioxide D. ethanol
A mosquito carrying the malaria parasite (P. falciparum) bites a woman's arm. What structures must the mouth parts of the mosquito pass through to introduce the parasite into the woman's bloodstream? Select all correct choices
A. portions of the epidermis B. keratin-covered cells C. portions of the dermis D. connective tissue
The scientific name for the Golden crayfish is Orconectes luteus. The correct name of the genus for this fish is
A. Orconectes luteus. B. Orconectes. C. luteus. D. O. luteus. E. Orconectes l.