Escherichia coli preferentially utilizes glucose by preventing the uptake of lactose and switching off transcription of the lac operon. This mechanism is known as 

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#Question id: 6952

#5. Developmental Biology

Which technique is commonly used for gene knock-out in mice?

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#Question id: 6953

#5. Developmental Biology

Maternal factors are:

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#Question id: 6954

#5. Developmental Biology

Between fertilization and the first cleavage division, actin filaments pull the cytoplasm of the frog egg toward the point of sperm entry in a process called:

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#Question id: 6957

#5. Developmental Biology

The effect of grafting an extra piece of notochord into a dorsal position adjacent to pre-somitic mesoderm is

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#Question id: 6959

#5. Developmental Biology

Which of the following is NOT involved in left-right asymmetry of vertebrates?

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#Question id: 6961

#5. Developmental Biology

Do HOX genes play a role in the development of C. elegans?