In the Drosophila egg, karyokinesis occurs without cytokinesis to create a syncytium.

TLS Online TPP Program

#Id: 1847

#Unit 3. Fundamental Processes

Two commonly used epitope tags are FLAG, which encodes the amino acid sequence DYKDDDDK (single-letter amino acid code), and myc, which encodes the sequence EQKLISEEDL.

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#Id: 8389

#Unit 2. Cellular Organization

Smooth muscle contraction is regulated by the cycling of myosin II between on and off states.

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#Id: 7768

#Unit 1. Molecules and their Interaction Relevant to Biology

Atoms are indivisible particles that can't be created or destroyed in a chemical reaction.

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#Id: 6344

#Unit 8. Inheritance Biology

TLS Online TPP Program

#Id: 6582

#Unit 7. System Physiology – Animal

Sertoli cells secrete 

Androgenbinding protein (ABP), inhibin, and MIS

The fluid in the lumen of the seminiferous tubules is quite different from plasma; it contains very little protein and glucose but is rich in androgens, estrogens, K+ , inositol, glutamic and aspartic acids.  Maintenance of its composition depends on the blood–testis barrier.