What is the function of bactoprenol?
A) It is a hydrophobic alcohol that transports peptidoglycan precursors across the cytoplasmic membrane.
B) It is responsible for forming the peptide cross-links between muramic acid residues in adjacent glycan chains.
C) It triggers the recruitment of FtsZ and the initiation of the divisome.
D) It supplies the energy necessary for transpeptidation to occur.
Answer: A
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Chemical energy is most often released by ________.
A. adding phosphate groups to a molecule B. creating a bond between two molecules C. breaking a bond within a molecule D. reorganizing molecules with each other
How many unique mRNA codons can be constructed from the four different RNA nucleotides?
A. four B. 12 C. 16 D. 61 E. 64
Which of these processes brings into the cell large macromolecules and particles by the formation of a vesicle in the outer membrane?
A) facilitated transport B) endocytosis C) pinocytosis D) exocytosis
After papaya seeds germinate, the hypocotyl elongates and forms a hook. This hook straightens and pulls the cotyledon and the shoot tip of the seedling into the air, leaving the seed coat in the soil. This method of embryonic shoot emergence is most similar to shoot emergence in which plant?
A. corn B. garden bean C. onion D. pea