Question

dna, rna, and replication crossword

across

1. dna polymerase, helicase, and ligase are examples of this.
2. how many strands does rna have?
3. this base always pairs with cytosine.
4. in dna this always pairs with adenine.
5. the shape of dna (two words)
6. the sugar found in rna.
7. this enzyme \unzips\ dna during replication.
8. dna contains instructions on how to make these
9. since dna contains one new strand and one original strand, it is said to be

down

1. the process of copying dna that occurs before cell division.
2. these consist of a sugar, phosphate, and nitrogenous base
3. this enzyme adds nucleotides during replication. (two words)
4. the sugar found in dna.
5. this base is only found in rna.
6. this enzyme links pieces of newly made dna

Explanation:

Each answer is derived from core concepts of DNA, RNA, and replication molecular biology:

1. Across 2: DNA polymerase, helicase, ligase are all proteins that catalyze reactions in replication.
2. Across 3: RNA is a single-stranded nucleic acid.
3. Across 6: Guanine (G) forms complementary base pairs with cytosine (C) in DNA/RNA.
4. Across 7: Thymine (T) is the complementary base to adenine (A) in DNA.
5. Across 9: DNA has a double helical, twisted ladder shape.
6. Across 11: Ribose is the 5-carbon sugar in RNA nucleotides.
7. Across 12: Helicase breaks hydrogen bonds to separate DNA strands in replication.
8. Across 14: DNA stores the genetic code to synthesize proteins.
9. Across 15: Semi-conservative replication produces DNA with one old, one new strand.
10. Down 1: DNA replication is the process of copying DNA before cell division.
11. Down 4: Nucleotides are the basic building blocks of DNA/RNA, made of sugar, phosphate, and a base.
12. Down 5: DNA polymerase adds complementary nucleotides to the growing DNA strand.
13. Down 8: Deoxyribose is the 5-carbon sugar in DNA nucleotides.
14. Down 10: Uracil (U) replaces thymine in RNA, pairing only with adenine.
15. Down 11: DNA ligase seals gaps between Okazaki fragments in the lagging strand.

Answer:

Across:

1. ENZYMES
2. ONE
3. GUANINE
4. THYMINE
5. DOUBLE HELIX
6. RIBOSE
7. HELICASE
8. PROTEINS
9. SEMI-CONSERVATIVE

Down:

1. REPLICATION
2. NUCLEOTIDES
3. DNA POLYMERASE
4. DEOXYRIBOSE
5. URACIL
6. LIGASE