Answer:
There is no mixing of oxygen-rich and oxygen-poor blood.
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The right atrium and right ventricle of the human heart pump oxygen-poor blood to the lungs and the left atrium receives oxygen-rich blood. They never mix.
The law of conservation of energy basically states that energy a\cannot be created or destroyed, therefore if it disappears in one form it must reappear in another (answer C.)<span />
Answer:
The mismatch pair is plasmodium causes chagas disease. Chagas disease occurs due to Trypanosoma cruzi.
Explanation:
Chagas disease is a parasitic disease .It also known as American Trypanosomiasis. Chagas disease is occurs due to the <u>Trypanosoma cruzi</u> parasite.It is spread mostly by insects .The name of the insect is Triatominae, or "kissing bugs". The symptoms change during the course of the infection.
Plasmodium is a protozoan parasite which causes malaria in the human body.
Giardia is a microscopic parasite. It has been contaminated with feces (poop) from infected humans or animals.So this match is correct.
African sleeping sickness caused by a microscopic parasite species <u>Trypanosoma</u> <u>bruce</u>i. It is transmitted by the tsetse fly , which is found only in rural Africa.
Histoplasmosis (Ohio valley fever) is a fungal infection which causes by Histoplasma .It generally effect on lungs and immune system.
Trichomoniasis (or “trich”) caused by infection with a protozoan parasite called<u> </u><u>Trichomonas</u> <u>vaginalis</u>.Its a sexually transmitted disease (STD).It cause foul smelling in women vagina.
Answer:
a. The directionality of the complementary strand is antiparallel. The double-stranded DNA is antiparallel comprising two strands, which run alongside each other, however, point in reverse directions. In a double-stranded molecule of DNA, the 5 prime ends of one strand align with the 3 prime ends of the other strand, and vice versa.
b. The mediation of base pairing is done by non-covalent hydrogen bonds. It is reversible, that is, the strands can separate and can come combined again without any chemical modification.
The specificity of base pairing is illustrated by hydrogen bonds that is, the first strand produces hydrogen bonds only with a particular base in the second strand, and these two bases produce a base-pair.
c. The interaction or association of non-covalent type, that is, hydrophobic interaction and hydrogen bonding. Collectively, they both are strong. In the process, one base associate with the other base on the complementary strand.
d. The phosphate backbone possesses the tendency to associate with water on the outside of the molecule, and this is favorable chemically as both the strands are held together by hydrogen bond and hydrophobic interaction.
The polar molecules of sugar can produce hydrogen bonds with the surrounding molecules of water. The negatively charged phosphate group associate with the positively charged ions. The nonpolar nitrogen bases are found within the molecule and associate favorably through stacking interactions.