Which type of protein penetrates tot he interior of the plasma membrane but does not extend all the way through it

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these

Based on the data in the graphs do you think pepsin and trypsin are found in the same part of the body? explain your answer.

Idon’t understand this can someone give me the answer? you