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True or false? Lipofuscin is an organelle that digests old and damaged cell components.脂褐素是一种细胞器，可以消化旧的和受损的细胞成分。

A. TRUE
B. FLASE

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The portion of the neuron that carries a nerve impulse away from the cell body is the:携带神经冲动远离细胞体的神经元部分是：

A. dendrite.
B. nissle body.
C. synaptic end bulb.
D. axon.

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The most common neuron type in the central nervous system is:中枢神经系统中最常见的神经元类型是：

A. multipolar.
B. bipolar.
C. unipolar.
D. pseudounipolar.

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Clusters of RER and free ribosomes in neurons are called:神经元中RER和游离核糖体的簇被称为：

A. perikaryon.
B. neurofilaments.
C. nissl bodies.
D. microglia.
E. neurofibrils.

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The process of transcription involves the production of:转录的过程涉及到：

A. new amino acids.
B. a chain of amino acids from an mRNA template.
C. dNA from an mRNA template.
D. mRNA from a DNA template.
E. ribosomes in the nucleus.

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True or false? Lipofuscin is an organelle that digests old and damaged cell components.脂褐素是一种细胞器，可以消化旧的和受损的细胞成分。

A. TRUE B. FLASE

The portion of the neuron that carries a nerve impulse away from the cell body is the:携带神经冲动远离细胞体的神经元部分是：

The most common neuron type in the central nervous system is:中枢神经系统中最常见的神经元类型是：

Clusters of RER and free ribosomes in neurons are called:神经元中RER和游离核糖体的簇被称为：

The process of transcription involves the production of:转录的过程涉及到：

A. TRUE
B. FLASE