Which of the following organelles is correctly
matched with its function?
a. vacuoles: energy production
b. rough ER: protein synthesis
c. Golgi bodies: lipid formation
d. mitochondria: photosynthesis
e. smooth ER: waste removal
B
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One reason to study DNA-protein interactions is because many proteins (e.g., regulatory proteins and proteins involved in replication and transcription) directly interact with DNA, and by understanding those interactions, we may be able to inhibit microorganism pathways in the future.
Answer the following statement true (T) or false (F)
Archaeopteryx and Sinosauropteryx prima are
related to
a. modern lizards. b. modern birds. c. modern snakes d. modern bats. e. modern crocodiles
Homeostasis is defined as the ability of an organism to
A. anchor itself to the rocks or soil of a body of water. B. carry out chemical reactions. C. sexually mature. D. withstand extreme temperatures. E. maintain a stable internal environment.
The average molecular weight of the 20 standard amino acids is 138, but biochemists use 110 when estimating the number of amino acids in a protein of known molecular weight. Why?
A) The number 110 is based on the fact that the average molecular weight of a protein is 110,000 with an average of 1,000 amino acids. B) The number 110 reflects the higher proportion of small amino acids in proteins, as well as the loss of water when the peptide bond forms. C) The number 110 reflects the number of amino acids found in the typical small protein, and only small proteins have their molecular weight estimated this way. D) The number 110 takes into account the relatively small size of nonstandard amino acids. E) The number 138 represents the molecular weight of conjugated amino acids.