In the Watson–Crick model of DNA structure, the polynucleotide chains ____
a. are of unequal length
b. are arranged with the bases forming the backbone of the helix
c. form covalent bonds between uracil and adenine
d. are oriented in the same direction
e. are oriented in opposite directions
e
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Pseudonocardia is an organism that is hosted by
A. ants that cultivate fungal gardens. B. wood-eating insects. C. people with severe acne. D. marine invertebrates.
The main class(es) of neurotransmitters involved in regulating mood in vertebrate animals is/are
A. the biogenic amines. B. acetylcholine and amino acids. C. gases such as nitric oxide and carbon monoxide. D. amino acids. E. acetylcholine.
At the end of the contractile period, energy from the breakdown of ATP is used to
A) transport calcium back into the sarcoplasmic reticulum. B) repair any muscle damaged during contraction. C) digest energy sources to generate new ATP for the next round of contractions. D) produce lactic acid. E) unlink the troponin-tropomyosin complexes.
Foraging behaviors are those having to do with which of the following? (Check all that apply.)A) How an animal avoids becoming the prey of a larger predatorB) How an animal finds its foodC) How much food an animal eatsD) What an animal eatsE) When an animal eats
What will be an ideal response?