Ceruminous glands secrete:

 

The correct answer is choice C. DNA. DNA carries the genetic information in the cells of all living organisms. It contains codes for the assembly of amino acids into all the proteins required in the body. The sequence of bases in a DNA molecule can determine the order of amino acids in a protein molecule. Groups of three bases called codons represent different amino acids. This is the basis of the genetic code.

Choice A is wrong because mRNA is a type of RNA that carries the genetic information from DNA to the ribosomes, where protein synthesis takes place.

mRNA is not the original carrier of the genetic code, but a messenger that transfers it.

Choice B is wrong because tRNA is a type of RNA that brings amino acids to the ribosomes, where they are joined together to form proteins. tRNA has a complementary sequence to mRNA, called an anticodon, that allows it to pair with the correct codon on mRNA.

Choice D is wrong because chromosomes are structures made of DNA and proteins that contain many genes.

Chromosomes are not the carriers of the genetic code, but the structures that organize and store it.

Choice E is wrong because nucleotides are the building blocks of DNA and RNA. Nucleotides are composed of a nitrogenous base, a sugar, and a phosphate group.

Nucleotides are not the carriers of the genetic code, but the units that make up the code.

Lactic acid is a byproduct of anaerobic respiration, which occurs when there is not enough oxygen for the cells to produce energy. Lactic acid accumulates in the muscles and causes a burning sensation.

Choice A is wrong because creatine-phosphate is a molecule that helps regenerate ATP, the main energy source for cells.

Creatine-phosphate does not cause a burning sensation.

Choice C is wrong because adenosine diphosphate (ADP) is a molecule that is converted into ATP by adding a phosphate group.

ADP does not cause a burning sensation.

Choice D is wrong because creatine-phosphate is a molecule that helps regenerate ATP, the main energy source for cells.

Creatine-phosphate does not cause a burning sensation.

The correct answer is choice D. Carrots and squash. These foods are rich in carotenoids, which are orangey-red pigments that can accumulate in the skin and cause a yellowish or orangey discoloration. This condition is called carotenemia and is usually harmless and reversible by reducing the intake of carotenoid-rich foods.

Choice A is wrong because spinach and mustard greens are not high in carotenoids, but rather in chlorophyll, which is a green pigment that does not affect skin color.

Choice B is wrong because turnips and beets are not high in carotenoids, but rather in betalains, which are red or yellow pigments that are mostly excreted in urine and do not accumulate in the skin.

Choice C is wrong because rice and eggs are not high in carotenoids, but rather in protein and starch, which do not affect skin color.

It is part of the rib cage and serves as an attachment site for some abdominal muscles.

Choice A is wrong because the hyoid bone is a U-shaped bone located in the neck, above the larynx. It does not articulate with any other bone and supports the tongue and laryngeal muscles.

Choice B is wrong because the ossa coxae are the hip bones that form the pelvic girdle. They are composed of three fused bones: ilium, ischium and pubis.

Choice C is wrong because sesamoid bones are small, round bones that are embedded in tendons.

They protect the tendons from wear and tear and increase their leverage. The most common sesamoid bone is the patella (kneecap).