Thin filaments and thick filaments are made of proteins. Of which of the following proteins are thin filaments composed?
a. myosin
b. lectin
c. actin
d. keratin
c. actin
Biology & Microbiology
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In which cells do erasure and re-establishment of imprinting marks typically NOT occur?
A. Nurse cells B. Sperm cells C. Oocytes D. Somatic cells
Biology & Microbiology
A key step in the evolution of vascular plants was the ability to produce __________, a strengthening
polymer in the walls of cells that function in support and conduction. a. lignin b. cellulose c. starch d. fructose e. cutin
Biology & Microbiology
Cells that secrete large amounts of glycoprotein have many Golgi stacks
__________________ Indicate whether the statement is true or false.
Biology & Microbiology
Which of the following molecules could be secreted from a eukaryotic cell?
a. ions b. metals c. water d. carbohydrates
Biology & Microbiology