Which of the following is NOT found or observed to occur in both mitochondria and prokaryotes?
A) circular chromosome
B) 70S ribosomes
C) cell wall
D) binary fission
E) ATP-generating mechanism
C
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Which adaptation is unique to insects among all protostomes?
A) the ability to move via jointed limbs B) the ability to move by flying C) the ability to consume terrestrial plants D) the ability to parasitize other organisms E) the ability to metamorphose
The chromoplast is an organelle associated with
A) oxidation of sugars. B) synthesis of secretory proteins. C) plant pigment storage. D) ribosome production in primitive plants. E) storage of chromium.
How do transcription repressors work?
a. They bind to the same sequence where activators normally bind. b. They bind to and disable the activator. c. They recruit histone acetylation enzymes and thus interfere with chromatin remodeling. d. They bind to RNA polymerase II and prevent it from binding to the transcription factor complex e. They methylate DNA.
A cell that is 98% water is placed in a solution containing 1% salt. This cell is now ____ compared to its surroundings.
A. isotonic B. hypertonic C. hypotonic D. hydrophilic