Which type of bond in the dna molecule does dna helicase breaks?

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

Why do you think the puppy litter was all dark-haired?

Which organelle breaks down sugar molecules that supply energy to the cell ?