Answer:
Friction
Explanation:
Because the cow is walking
Answer:
D. some components of the cycle are used as building blocks for certain anabolic pathways
Explanation:
Kreb's cycle starts when pyruvate enters the cycle in the form of acetyl CoA. The cycle completely breakdown acetyl CoA into CO2 and H2O. The released energy is stored in the form of NADH and FADH2 which enter oxidative phosphorylation to drive ATP synthesis. Kreb's cycle is an amphibolic pathway as it is involved in both catabolic and anabolic processes.
Some of the intermediates of Kreb's cycle serve as precursors for other anabolic pathways. For example, alpha-Ketoglutarate and oxaloacetate from Kreb's cycle enter the anabolic processes of synthesis of amino acids aspartate and glutamate respectively. Succinyl CoA from Kreb's cycle serves as one of the intermediates for the synthesis of porphyrin rings present in "heme" groups. The heme group is a structural and functional part of hemoglobin and myoglobin proteins.
Phosphorus moves in a cycle through rocks, water, soil and sediments and organisms. Over time, rain and weathering cause rocks to release phosphate ions and other minerals. Once in the plant or animal, the phosphate is incorporated into organic molecules such as DNA. i hope this helped <3
