All of the following statements apply to the Watson and Crick model of DNA excepl. A)The framework of the helix consists of repeating sugar-phosphate units.
B)The two strands of the DNA form a double helix.
C)The distance between the strands of the helix is uniform.
D)The purines are attracted to pyrimidines.
E)The two strands of the helix are held together by covalent bonds.

Ayoung boy has been found and police are trying to locate his family they take a dna sample from him and begin collec dna samples from families who have missing children if police use dna samples only from the fathers, which type of dn technology can they use to identify the boy's parent? y-chromosome analysis omtdna (mitochondrial dna) analysis vntrs (variable tandem repeats) o pcr (polymerase chain reaction) analysis

The picture represents a structure of the respiratory system. which is the function of this structure? to bring air into the body to exchange oxygen with carbon dioxide to carry air to the lungs to release oxygen from the body

Which is the correct formula for photosynthesis