Given what is known about the minimal essential functions of cellular life, if you could create an artificial cell, what cellular structures must you include?
A. cell wall
B. ribosomes
C. mitochondria
D. nucleus
B. ribosomes
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Pair-rule developmental genes belong to which class of pattern-regulating genes?
A. homeotic B. maternal C. segmentation D. None of the choices is correct.
Experimentally heating amino acids and exposing them to water resulted in ________
a. living cells b. protocells that could capture energy, concentrate materials, and replicate themselves c. denatured proteins d. proteins identical in sequence to some found in modern animals
Which of the following is characteristic of steroid hormones?
a. They are derived from peptides or proteins. b. They influence the activity of DNA. c. They interact with receptors on the exterior surface of the cell membrane. d. They utilize second messenger systems to produce target tissue actions. e. They produce cAMP molecules in target tissue.
In what type of tissue would platelets be found?
A) epithelial tissue B) muscle tissue C) nervous tissue D) connective tissue