The medulla oblongata functions in regulating many things in the human body. Which of the following processes does it NOT control?
Answer(s): E
The medulla oblongata indeed controls options breathing rate, heart rate, blood pressure, reflexes. Movement, however, is controlled by the cerebrum. The functions of each part of the brain is required to be known and is commonly tested on.
In a sample with 46 homologous pairs of chromosomes, what is the total number of chromatids present in the sample?
Answer(s): D
If there are 46 homologous chromosomes present, it means there is a total of 92 chromosomes. 46 come from the father, 46 from the mother. Thus with 92 chromosomes, there is a total of 184 chromatids.
Which structure is responsible for a sperm cell's motility?
Answer(s): B
The flagellum is responsible for propelling the sperm. The acrosome contains the digestive enzymes that break down the ovum membrane.
Carbohydrate digestion begins in the ______, while protein digestion begins in the ______?
Carbohydrate digestion begins in the mouth with the initial breakdown via salivary amylase. Proteins begin being denatured in the stomach via hydrochloric acid and the enzyme pepsin.
Which of the following possesses a cell wall?
All of the answer choices do indeed a contain cell wall. The anatomy of the cell of various kingdoms should be known.
In times of starvation, which of the following would NOT be expected to be seen in high quantity in the blood?
In times of starvation, glucagon is released by the alpha cells of the pancreas to signal to the liver to break down stored glycogen into free glucose molecules that can enter the blood stream where they are lacking. Ghrelin plays a role in signaling the urge to be ‘hungry’. Ketone bodies are released by the liver in times of starvation (especially carbohydrate starvation) where they are picked up by cells, converted into acetyl-CoA, entering the TCA cycle.
Which of the following statements is FALSE regarding C3 and C4 photosynthesis?
All of the above are accurate statements.
Hormones composed of steroids are synthesized in which of the following organelles in the cell?
Answer(s): A
The smooth ER is responsible for synthesizing components of the plasma membrane along with lipids (steroids) such as testosterone that act as hormones in the body. It is critical to be familiar with the cell organelles and their function as it is expected to be a question in the biology section.
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