A ribosome has one binding site for mRNA and two binding sites for tRNAs
__________________ Indicate whether the statement is true or false.
False - three
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Organic compounds are distinguished by molecules that contain ________ bonded to other elements.
A. nitrogen B. hydrogen C. oxygen D. carbon
Only proteins can act as cellular catalysts
1.True 2.False
All of following statements are TRUE regarding estrogen and progesterone, EXCEPT which one?
A) They are produced and secreted by the ovaries in response to hormones from the anterior pituitary gland. B) They are released during a female's reproductive years. C) They are peptide hormones that activate target cells through the cyclic AMP second messenger mechanism. D) They regulate the menstrual cycle. E) They stimulate development of female secondary sex characteristics.
Most herbivorous animals do not have the ability to digest the cellulose in plants. What mechanism has evolved in the absence of this ability that allows them to survive despite eating only plant matter?
A) production of saliva containing amylase B) digestion by symbiotic microorganisms C) avoidance of plants containing cellulose D) converting cellulose to other carbohydrates in the animal's own cells