How are receptor tyrosine kinases and steroid hormone receptors similar?
A. Both are transmembrane proteins with a single transmembrane domain
B. Both have a site for binding ligand
C. Both are activated by autophosphorylation
D. Both have a DNA-binding domain
Answer: B
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Which of the following events occurs during mitosis but not during meiosis?
A) Sister chromatids segregate. B) Homologous chromosomes pair. C) Crossing-over occurs between homologous chromosomes. D) Chromosomes align on the metaphase plate. E) None of the choices is correct.
Many plants wind up with a Na+ concentration that is considerably lower than that of the surrounding soil. What plays a key role in allowing for such a difference to exist?
a. endodermis b. tonoplast c. aquaporin d. water potential
Without the ________, the semen would not naturally be able to counteract the acidity of the vagina
A) glans penis B) interstitial cells C) seminal vesicles D) prostate
Structure across a dividing plant cell that signals the location of new plasma membranes and cell walls.
What will be an ideal response?