Practice Questions

TLS Online TPP Program

#Question id: 11544

When a steroid hormone and a polypeptide hormone exert similar effects on a population of target cells, then ________.

#Unit 7. System Physiology – Animal

the steroid and polypeptide hormones must use the same biochemical mechanisms
the steroid and polypeptide hormones must bind to the same receptor protein
the steroid hormones affect the synthesis of effector proteins, whereas polypeptide hormones activate effector proteins already present in the cell
the steroid hormones affect the activity of certain proteins within the cell, whereas polypeptide hormones directly affect the processing of mRNA

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TLS Online TPP Program

#Question id: 11430

#Unit 2. Cellular Organization

For GLUT1 in the human erythrocyte membrane, the Km for glucose transport is 1.5 mM. Thus when the extracellular glucose concentration is 1.5 mM, roughly half the GLUT1 transporters with outward-facing binding sites will have a bound glucose, and transport will occur:

TLS Online TPP Program

#Question id: 11467

#Unit 2. Cellular Organization

Amyloplast stores

TLS Online TPP Program

#Question id: 11468

#Unit 2. Cellular Organization

Elaioplast plastids stores

TLS Online TPP Program

#Question id: 11469

#Unit 2. Cellular Organization

plant part not absorb light, which type of plastid it is

TLS Online TPP Program

#Question id: 11470

#Unit 2. Cellular Organization

Active form of phytochrome is

TLS Online TPP Program

#Question id: 11490

#Unit 2. Cellular Organization

Valinomycin, which is one of the best characterized ionophores, specifically transports