What controls what molecules pass in and out of a cell?
The answer is an envelope.
A virus is an infectious agent that can replicate only inside a host cell. When it is outside the cell, it consists of genetic material coated with protein capsid. Some viruses also have an envelope which covers capsid. The function of the envelope is to identify and bind some receptor sites on the host membranes. After fusing with the cell membrane, it allows to capsid and genetic material to enter the cell and infect it.
Answer:
The correct answer is CHLOROPHYLL
Answer:
What is this picture supposed to mean? What do we do with this? How do we solve this for you?
All carbohydrates, including sugar, therefore contain the same three elements: carbon, hydrogen<span> and </span>oxygen<span>. Different arrangements of these elements </span>form<span> single units to make different types of carbohydrates. Glucose, for instance, is a single-unit carb with six </span>carbon atoms<span>, 12 </span>hydrogen<span> atoms and six </span>oxygen atoms<span>. hope this helps . </span>
