_61. An iodine solution is placed on the cut side of a potato. With in seconds, a blue-black color appears.
What is most likely occurring?
a. Positive test for proteins
c. Negative test for proteins
b. Positive test for starches
d. Negative test for starches

An iodine solution is placed on the cut side of a potato. With in seconds, a blue-black color appears thus showing "positive test for starches".

Option: B

Explanation:

Amylose in starch is accountable in the existence of iodine for production of a deep blue shade. Within the amylose coil the iodine molecule slips. Attach a solution or directly to a potato or other products such as pasta, crackers, or flour with Iodine-KI reagent. If starch is available a blue-black color results.

If starch amylose is not available then orange or yellow will remain the color. Variations in some inorganic reactions to the reduction of oxidation, iodine may be used as an indicator for following changes in iodide ion and iodine product. Soluble solvent is applied to the starch.

humans, along with other animals and plants, have linear chromosomes that are arranged in pairs within the nucleus of the cell. the only human cells that do not contain pairs of chromosomes are reproductive cells, or gametes, which carry just one copy of each chromosome.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.