6. Draw the structures of the followinga. Cyclic GMPb. Guanosine tetra phosphatec. FADd. ATP7. In samples of DNA isolated from two unidentified species of bacteria, X and Y, adeninemakes up 32% and 17%, respectively, of the total bases. What relative proportions ofadenine, guanine, thymine, and cytosine would you expect to find in the two DNAsamples? What assumptions have you made? One of these species was isolated from ahot spring (64 0C). Which species is most likely the thermophilic bacterium, and why?

a. Cyclic GMP: To draw the structure of cyclic GMP, we start with a guanosine monophosphate (GMP) molecule. GMP consists of a guanine base attached to a ribose sugar and a phosphate group. To make it cyclic, the phosphate group forms a bond with the hydroxyl group on the ribose sugar, creating a ring structure. The guanine base remains attached to the ribose sugar within the ring structure.

b. Guanosine tetra phosphate: To draw the structure of guanosine tetra phosphate (ppGpp), we start with a guanosine diphosphate (GDP) molecule. GDP consists of a guanine base attached to a ribose sugar and two phosphate groups. In ppGpp, two additional phosphate groups are added to the existing phosphate groups of GDP, resulting in a total of four phosphate groups attached to the ribose sugar.

c. FAD: FAD stands for flavin adenine dinucleotide. To draw the structure of FAD, we start with an adenine molecule attached to a ribose sugar and a phosphate group. The ribose sugar is further attached to a flavin mononucleotide (FMN) molecule, which consists of a flavin ring structure attached to a ribose sugar and a phosphate group. The phosphate group of FMN is then linked to the phosphate group of the adenine molecule, forming the dinucleotide structure of FAD.

d. ATP: To draw the structure of ATP (adenosine triphosphate), we start with an adenine molecule attached to a ribose sugar and a phosphate group. Two additional phosphate groups are attached to the ribose sugar, resulting in a total of three phosphate groups. The adenine base remains attached to the ribose sugar within the structure.

7. In DNA, adenine always pairs with thymine, and guanine always pairs with cytosine. The base pairing rule states that the amount of adenine should be equal to the amount of thymine, and the amount of guanine should be equal to the amount of cytosine. Therefore, if adenine makes up 32% of the total bases in DNA sample X, then thymine should also make up 32%. Similarly, if adenine makes up 17% of the total bases in DNA sample Y, then thymine should also make up 17%. The same applies to guanine and cytosine.

Assumptions made:

1. The DNA samples are double-stranded DNA.
2. The DNA samples are representative of the entire genome of the bacteria species.
3. The DNA samples do not contain any other bases or modifications.

Based on the information provided, the thermophilic bacterium is most likely the species isolated from the hot spring (64°C). Thermophilic bacteria are adapted to survive and thrive in high-temperature environments. The higher temperature of the hot spring suggests that the DNA of the thermophilic bacterium needs to be more stable and resistant to heat-induced damage. Adenine and thymine form two hydrogen bonds, while guanine and cytosine form three hydrogen bonds. The higher percentage of adenine in the DNA sample from the thermophilic bacterium suggests a higher proportion of adenine-thymine base pairs, which would contribute to the stability of the DNA at high temperatures.