The lumen of a transverse tubule is occupied by
A. sarcomeres.
B. actin.
C. cytoplasm.
D. extracellular fluid.
E. myosin.
Answer: D
You might also like to view...
In the microdroplet culture method, cells from mixed assemblages are encapsulated in a gel matrix. The matrix is then emulsified to generate gel "microdroplets"; each microdroplet contains a mixture of cells.
Answer the following statement true (T) or false (F)
What is the intensity of that color?
a. 25 b. 50 c. 75 d. 100
When CpG islands are unmethylated, __________
A) chromatin in the promoter region is open, allowing access by transcription factors and RNA polymerase B) chromatin in the promoter region is closed, preventing transcription factors and RNA polymerase from binding C) chromatin in the enhancer region is closed, so they are unable to bind regulatory proteins to initiate transcription D) DNAse hypersensitivity in that region of the chromosome is lost E) genes downstream of the CpG islands cannot be expressed, because the promoter region is blocked by histones
Skin color in a certain species of fish is inherited via a single gene with four different alleles. One fish of this type has alleles 1 and 3 (S1S3 ) and its mate has alleles 2 and 4 (S2S4 )
If each allele confers a unit of color darkness such that S1 has one unit, S2 has two units, and so on, then what proportion of their offspring would be expected to have five units of color? A) 1/4 B) 1/8 C) 1/2 D) 0