A. Psoriasis
B. Brucellosis
C. Olkunginys
D. Dengue
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Psoriasis is a chronic skin condition that causes red, scaly patches on the skin. It is not contagious, and it is not caused by any microorganism. It is believed to be an autoimmune disorder where the immune system attacks healthy skin cells.
Therefore, the Correct Answer is A.
Which of the following types of cells stimulates other immune cells to attack and destroy foreign agents?
A. Cytotoxic T-cells
B. Plasma cells
C. Natural killer cells
D. Helper T-Cells
The Correct Answer is D.Helper T cells are important cells that stimulate the action of other immune cells. For instance, they not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.
Which of the following organelles is the site of intracellular digestion?
A. Mitochondria
B. Lysosomes
C. Centrosomes
D. Ribosomes
The Correct Answer is B.Lysosomes are membrane-bound organelles that contain lysozymes that are responsible for breaking down waste materials and cellular debris through intracellular digestion. This process helps maintain cellular health and homeostasis by recycling and degrading cellular components.
Which of the following contains a human's hereditary information?
A. chromatin
B. Histones
C. ATP
D. Plasmids
The Correct Answer is A.Rationale
Chromatin refers to a complex of DNA and proteins in human cells. This material is packaged by histones to make up the chromosomes. The chromosomes then contain genetic information that is heritable.
Which of the following nucleotides is only found in RNA?
A. Guanine
B. Thymine
C. Uracil
D. Adenine
The Correct Answer is C.Uracil is the nucleotide that is only found in RNA. The other nucleotides are found in both DNA and RNA
Which of the following body systems breaks down proteins into amino acids?
A. Digestive
B. Excretory
C. Circulatory
D. Endocrine
The Correct Answer is A.The digestive system breaks down complex food substances into small and less complex absorbable compounds. Proteins, for instance, are broken down to constituent amino acids through a digestion process that combines mastication and enzymatic breakdown.
The vermiform appendix extends from the region of the large intestine known as which of the following?
A. jejunum
B. Rectum
C. Cecum
D. Achi
The Correct Answer is C.The vermiform appendix is a small, finger-like projection that extends from the cecum, which is the first part of the large intestine.
Which of the following would result in an increase in the chemical reaction?
A. Adding more of the product
B. Decreasing the concentration of the reactant
C. Sealing the reaction in an airtight container
D. Using a mortar and pestle to grind a solid reactant to a powder
The Correct Answer is D.Crushing a solid reactant into powder increases the surface area of the reactant, thereby increasing chemical reaction. This is because more of the reacting molecules or ions are exposed to the other reactant, which increases the chance of particles colliding and leads to more successful collisions per second.
Which of the following structures is present in both prokaryotic and eukaryotic cells
A. Chloroplast
B. Cell membrane
C. Golgi apparatus
D. Endoplasmic reticulum
The Correct Answer is B.Both prokaryotic and eukaryotic cells have a cell membrane. The cell membrane is a barrier that surrounds the cell and separates its internal environment from the external environment.
A strand of DNA bases reads 5' AGCTAGCGT 3, what would the sequence of bases on the contemporary strand read?
A. 3' STOGUTCGCU
B. 5' AGCTAGCGT S
C. 3' SUCGAUCICA
D. 3' TCGATCGCA 5'
The Correct Answer is D.The complementary strand of DNA is formed by pairing complementary bases. In DNA, adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C). Additionally, RNA uses uracil (U) instead of thymine.
Given the sequence 5' AGCTAGCGT 3', the complementary strand would read:
3' TCGATCGCA 5'
In order to determine the effects of energy drinks on women's running speed, researchers gave 300 women an energy drink and then recorded the time it took each of them to run 2 miles. After collecting the results, researchers concluded that energy drinks increase the speed of running in
Which of the following further tests would best help to support this conclusion?
A. Repeat the same experiment, using 300 men
B. Repeat the experiment giving half of the women water and the other half the energy drink
C. Repeat the experiment giving the women two different energy drinks
D. Repeat the experiment, having half of the women run 2 miles and the other half run 5 miles
The Correct Answer is B.Conducting the experiment with half the women taking water and the other half taking an energy drink creates a study and experimental group, which can allow for comparison and conclusion. The researchers can compare the effects of the energy drink directly with a baseline, and this helps to establish a cause-and-effect relationship and provides stronger evidence to support their conclusion.