What are similarities and differences between the structures of DNA and RNA?

The similarities and differences between DNA and RNA are given as follows:

Explanation:

Similarities:

Both are made up of nucleotides

Nucleotides are made up of nitrogenous bases, a pentose sugar, and the phosphate backbone.

Both DNA and RNA have four nitrogenous bases each - two purines two pyrimidines

Purine binds with pyrimidines

Differences

DNA uses the nitrogenous bases adenine, cytosine, thymine, and guanine whereas RNA uses adenine, cytosine, uracil, and guanine. Uracil lacks a methyl group on its ring

RNA contains the sugar ribose that has an extra -OH while DNA contains the deoxyribose sugar that has H at the 2 carbon.

DNA is double-stranded while RNA is a single-stranded

Under alkaline conditions, DNA is stable while RNA is not stable.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.