【判断题】
Plant cells have chloroplastsfor photosynthesis whereas animal cells do not have.
参考答案:
A
参考解析:
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【判断题】
All cells share similar structure, composition and metabolic features: Plasma membrane, DNA/RNA, and Ribosome.
参考答案:
A
参考解析:
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【判断题】
The lightsource in a fluorescentmicroscope produces a beam of fluorescence that travels through a filter, which blocks all wavelengths except that which is capable of exciting the fluorophore(荧光基团).
参考答案:
B
参考解析:
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【单选题】
Definition ofMycoplasma
A.
It is a unicellular organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelle.
B.
It is the smallest and simplest self-replicating prokaryote.
C.
It is an irregularly shaped region within the cell of a prokaryote that contains all or most of the genetic material.
D.
Cells have a cell nucleus and other organelles enclosed within membranes.
E.
It is folded invaginations in the plasma membrane of bacteria.
参考答案:
B
参考解析:
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【判断题】
Prokaryotic and eukaryotic cells are distinguished by the size and the types of internal structures, especially if there is nuclear envelope.
参考答案:
A
参考解析:
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【判断题】
The DNA is the growing and developing basis of life.
参考答案:
B
参考解析:
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【单选题】
Definition of Nucleoid
A.
It is a unicellular organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelle.
B.
It is the smallest and simplest self-replicating prokaryote.
C.
It is an irregularly shaped region within the cell of a prokaryote that contains all or most of the genetic material.
D.
Cells have a cell nucleus and other organelles enclosed within membranes.
E.
It is folded invaginations in the plasma membrane of bacteria.
参考答案:
C
参考解析:
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【判断题】
Transmission electron microscopes (TEMs) form images using electrons that aretransmitted through anultrathin specimen.
参考答案:
A
参考解析:
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【判断题】
The mesosomeis plasma membrane enfoldingandinvolved in cell division andenergy releasing reactions of eukaryotic cells.
参考答案:
B
参考解析:
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