What is the term that describes a unit made of a sugar, a phosphate group, and a nitrogen-containing base?

1. What is the term that describes a unit made of a sugar, a phosphate group, and a nitrogen-containing base?


A. Adenine


B. DNA


C. nucleic acid


D. nucleotide





2. What are the four bases of DNA?


A. A, T, G, D


B. A, T, G, C


C. A, U, G, C


D. A, U, G, D





3. What are Chargaff's rules? (Note that each line represents a bond)


A. A = C and T 鈮?G


B. A = T and C 鈮?G


C. A 鈮?G and C = T


D. All four bases are in equal amounts.





4. What did Rosalind Franklin's DNA X-ray suggest?


A. DNA is made of a single strand of nucleotides.


B. Adenine pairs with cytosine and thymine pairs with guanine.


C. DNA is a double stranded helix of constant width.


D. DNA is a double stranded helix of variable width.





5. One strand of DNA has the sequence ATTGAT. What is the sequence on the other strand?


A. TAACGA


B. ATTGAT


C. ACCTAG


D. TAACTA|||1) D


2) B


3) B


4) C


5) D





Make sure you study as well, these all are basics at understanding of molecular biology