Which statement below accurately summarizes transcription? •mRNA in the nucleus codes for a strand of DNA, which then replicates the genes.
•DNA in the nucleus is copied into an mRNA strand, which then leaves the nucleus.
•DNA in the nucleus leaves and goes to the cytoplasm, where it is copied by ribosomes into rRNA.

Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements

The tubes transporting minerals and water upward are called ?

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the: