1. myosin is plentiful in muscle cells, but is not found at all in lens cells.
lens cells contain large amounts of crystallins, which are not found in
muscle cells. why do some proteins appear in one type of cell but not in
another?
during differentiation, certain genes are added to cells to produce proteins that
enable specific functions.
differentiated cells produce all proteins but destroy the proteins they do not
use.
differentiated cells release unused proteins into the blood for other cells to
use.
during differentiation, certain genes are activated to produce proteins that
enable specific functions.

What is the difference between how ionic and covalent bonds form

Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome