单选题 Which is the basis unit of life? ( )

A、 Cell

B、 Genetic material

C、 Protein

D、 Tissue

E、 Organ

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单选题 What is the difference between traditional cross-breeding and genetic engineering in terms of introducing traits into plants? ( )

A、Genetic engineering is faster but less precise than cross-breeding.

B、Genetic engineering is more laborious but has a wider scope of possibilities.

C、Genetic engineering introduces traits more consistently but lacks diversity.

D、Genetic engineering is less sustainable but more efficient.

E、The process of Genetic engineering usually takes a long time and may be affected by various factors.

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单选题 Which type of tissue lines the digestive tract and organs derived from it, such as the lungs? ( )

A、Epithelial tissue

B、Connective tissue

C、Muscular tissue

D、Nervous tissue

E、Endothelial tissue

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单选题 In monoclonal antibody production, what is the role of myeloma cells? ( )

A、To provide unlimited growth potential

B、To secrete specific antibodies

C、To act as antigen-presenting cells

D、To fuse with T cells

E、To enhance the titer of antibody

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单选题 Which structure is directly responsible for the formation of proteins within the cell. ( )

A、Lysosomes.

B、Vacuoles.

C、Centrioles.

D、Ribosomes.

E、Nucleus.

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单选题 How are cells isolated for cell culture? ( )

A、By placing the tissue in a growth medium.

B、By using enzymes to digest the extracellular matrix.

C、By filtering the blood to remove contaminants.

D、By explant culture.

E、All the above.

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单选题 Which type of tissue is responsible for absorption, secretion, and protection? ( )

A、Epithelial tissue

B、Connective tissue

C、Muscle tissue

D、Nervous tissue

E、Bone tissue

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单选题 Which of the following is NOT a benefit of genetic engineering in plants? ( )

A、Improved nutritional quality.

B、Increase disease resistance.

C、Enhance herbicide resistance.

D、Decrease pollination efficiency.

E、Provide protection against insect pests of the plant.

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单选题 What is the advantage of using monoclonal antibodies over polyclonal antibodies? ( )

A、Higher specificity

B、Lower cost

C、Faster production

D、Easier purification

E、All of above

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