Which of the following best describes the main purpose of the combined processes of glycolysis and cellular respiration?
the breakdown of glucose to carbon dioxide and water
conserving the energy in glucose and related molecules in a chemical form that cells can use for work
catabolism of sugars and related compounds
producing complex molecules from chemical building blocks
breaking down atp, so that adp and p can be reused

The correct answer is  conserving the energy of glucose and related molecules in chemical form that the cell can use for work

Explanation:

Glycolysis is an important process of cellular respiration.it occurs in the cytoplasm.

           Glycolysis deals with the break down of glucose and formation of  2 molecules of ATP along with pyruvate.pyruvate then enter into miticondria to carry out the TCA cycle which result in the formation of ATP, NADH,FADH2   and oxaloacetate. NADH is also formed during Glycolysis.

                 In the final process of aerobic respiration known as oxidative phosphorylation the reducing agents such as NADH and FAFH2 are oxidized by liberating electrons and phosphorylation of ADP occurs by the energy generated by proton motive force resulting in the formation of ATP.

          The so formmed ATP is a high energy compound which is utilized by our body to carry out  various process such as muscle contraction ,fatty acid biosynthesis etc.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.