Asap , anwer everything. < 3
1. the double helix structure of the dna looks like a ladder. which parts create the rungs? which parts hold the rungs together?

2. what components make up a nucleotide?

3. which nitrogenous bases pair with each other? what type of hydrogen bond forms between them?

4. what is the relationship between chromosomes, genes and dna molecules?

I'm not sure about 4. sorry, but

Explanation:

1. The hydrogen bases are like the rungs, and the base pairs make up the part that holds the rungs

2. The phosphate, the deoxyribose sugar, and the base

3. C pairs with G, and A pairs with T,

C - G

A - T

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.