题目内容

Whether a molecule can cross the plasma membrane depends upon ()

A. the size of the molecule
B. the shape of the molecule
C. the chemical properties of the molecule
D. all of the above

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The sodium-potassium pump moves sodium and potassium ions across the plasma membrane by ()

A. facilitated transport
B. active transport
C. cotransport
D. endocytosis

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What type of transporter moves glucose into the cell against its concentration gradient? ()

A. glucose uniport
B. Na+ - glucose antiport
C. Na+ - glucose symport
D. K+ - glucose symport

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Some proteins are commonly synthesized by ribosomes in association with the rough endoplasmic reticulum. Ultimately, where will these proteins be found? ()

A. cytosolic ribosomes, lysosomes, mitochondria, and cloroplasts;
B. integral proteins of the plasma membrane, lysosomal proteins, proteins involved in the processing of proteins within the endoplasmic reticulum;
C. ribosomal proteins, lysosomes, secretion;
D. proteins bound for organelles (mitochondria and chloroplasts) and proteins of cytosolic ribosomes

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Amino acid chains built by the ribosome in the RER then move to the ()

A. Golgi apparatus
B. lysosome
C. cytoplasm
D. mitochondria

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Whether a molecule can cross the plasma membrane depends upon ()

A. the size of the molecule B. the shape of the molecule C. the chemical properties of the molecule D. all of the above

The sodium-potassium pump moves sodium and potassium ions across the plasma membrane by ()

What type of transporter moves glucose into the cell against its concentration gradient? ()

Some proteins are commonly synthesized by ribosomes in association with the rough endoplasmic reticulum. Ultimately, where will these proteins be found? ()

Amino acid chains built by the ribosome in the RER then move to the ()

A. the size of the molecule
B. the shape of the molecule
C. the chemical properties of the molecule
D. all of the above