What part of the E. coli T4 phage attaches to the host cell receptors?
A.
Capsid fragments around the nucleic acid
B.
Protein fibers at the end of the phage tail
C.
Pili of the envelope
D.
Spikes of the envelope
B
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Which of the following types of cells is matched with the wrong stem cell category?
A. embryonic stem cells: pluripotent B. embryonic germ cells: pluripotent C. hematopoietic stem cells: multipotent D. myeloid cell: unipotent E. zygote: totipotent
What activates protein kinase C?
a. IP3 b. DAG c. cAMP d. PIP2 e. calcium ions
The relationship between biomass and primary productivity is that:
a. biomass is the rate of primary productivity b. biomass is the inverse of primary productivity c. biomass is the natural log of primary productivity d. primary productivity is the inverse of biomass e. primary productivity is the rate at which biomass is produced
The hydrocarbons found in the membranes of archaea are identical to those found in bacteria.
Answer the following statement true (T) or false (F)