Which of the following is the main function of centrosomes in animal cells?

A. Organelle trafficking

B. Pathogen digestion

C. Microtubule organization

D. Cytoplasm formation

Answer Explanation:

Centrosomes are small structures that are found near the nucleus of animal cells. They consist of two centrioles that are surrounded by a protein matrix called the pericentriolar material. The main function of centrosomes is to organize the microtubules, which are long, hollow tubes that form part of the cytoskeleton. Microtubules are involved in many cellular processes, such as cell division, cell movement, and intracellular transport. Centrosomes act as the main microtubule-organizing centers (MTOCs) in animal cells, meaning that they nucleate and anchor the microtubules

Therefore, the Correct Answer is C.

Q #1: Which of the following organic molecules contain both an amine and carboxyl group?

A. Lipids

B. Proteins

C. Chitin

D. Cellulose

Answer Explanation

An amine group is a nitrogen atom bonded to three hydrogen atoms, and a carboxyl group is a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group. These groups are important for the formation of amino acids, which are the building blocks of proteins.
Q #2: In the following data table of an experiment carried out at 4° C (39.2° F) over 4 hours, which of the following options represents the dependent variable? Solution in bag Solution outside bag Bag mass change (g) water water   -0.2 20% sucrose   water   +2.4   40% sucrose   water   +4.3   60% sucrose   water   +5.8  

A. Duration

B. Temperature

C. Sucrose concentrations

D. Bag mass change

Answer Explanation

The dependent variable is the variable that is measured or observed in an experiment. It is the variable that changes as a result of the independent variable, which is the variable that is manipulated or controlled by the experimenter. In this case, the dependent variable is the bag mass change, because it depends on the sucrose concentrations in the bag and outside the bag. The other variables, such as duration, temperature, and sucrose concentrations, are independent variables that are set by the experimenter.
Q #3: Which of the following is the structure through which blood exits the glomerulus?

A. Proximal tubule

B. Distal tubule

C. Afferent arteriole

D. Efferent arteriole

Answer Explanation

The glomerulus is a network of capillaries that filters blood and forms the primary urine. The blood enters the glomerulus through the afferent arteriole and leaves through the efferent arteriole. The efferent arteriole has a smaller diameter than the afferent arteriole, creating a high pressure in the glomerulus that facilitates filtration.

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Which of the following is the main function of centrosomes in animal cells?

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Q #1: Which of the following organic molecules contain both an amine and carboxyl group?

Answer Explanation

Answer Explanation

Q #3: Which of the following is the structure through which blood exits the glomerulus?

Answer Explanation

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