题目内容

Which of the following is not true about integral proteins?关于积分蛋白，以下哪一种是不正确的？

A. They are also known as transmembrane proteins.
B. They can be carrier proteins.
C. They are often attached to carbohydrates.
D. They can act as receptors.
E. They are only found in the outer part of the cell membrane.

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True or false? Lipoproteins are composed of hydrophilic heads.脂蛋白是由亲水性的头部组成的。

A. TRUE
B. FALSE

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The plasma membrane is said to be:等离子体膜被认为是：

A. freely permeable.
B. impermeable.
C. selectively permeable.

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Which of the following best describes a gland which secretes mucin (mucous)?以下哪一种最能描述分泌粘液(粘液)的腺体？

A. Endocrine serous gland.
B. Endocrine seromucous gland.
C. Endocrine mucous gland.
D. Exocrine mucous gland.
Exocrine serous cell.

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Which of the following best describes apocrine secretion?以下哪一种最能描述大汗腺分泌？

A. The product is released from secretory vesicles via exocytosis.
B. A portion of the cytoplasm containing the secretion is released.
C. The entire cell containing the secretion bursts.

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Which of the following is not true about integral proteins?关于积分蛋白，以下哪一种是不正确的？

A. They are also known as transmembrane proteins. B. They can be carrier proteins. C. They are often attached to carbohydrates. D. They can act as receptors. E. They are only found in the outer part of the cell membrane.

True or false? Lipoproteins are composed of hydrophilic heads.脂蛋白是由亲水性的头部组成的。

The plasma membrane is said to be:等离子体膜被认为是：

Which of the following best describes a gland which secretes mucin (mucous)?以下哪一种最能描述分泌粘液(粘液)的腺体？

Which of the following best describes apocrine secretion?以下哪一种最能描述大汗腺分泌？

A. They are also known as transmembrane proteins.
B. They can be carrier proteins.
C. They are often attached to carbohydrates.
D. They can act as receptors.
E. They are only found in the outer part of the cell membrane.