Is this a picture of chromosomes before or after DNA replication during the S phase of interphase?

Which class of molecules contains the amino group, nh2 (a) sugars (b) water (c) proteins (d) hydrocarbons

If a set of instructions that determines all of the charactersitics of an organism is comparedto a book,and a chromosme is compared to chaper in the book,then what might be compared to a paragraph in the book?

Which label identifies the part of the atp molecule that changes when energy is released in the cells of all living things