Why is tissue typing necessary before a kidney transplant?A. to determine the compatibility of the blood types of donor and recipient
B. to determine the compatibility of the organs of donor and recipient
C. to determine the compatibility of antibodies of donor and recipient
D. to determine the compatibility of the blood vessels of donor and recipient

Answers

Answer 1
Answer:

the answer is A. to determine the compatibility of the blood types of donor and recipient



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Which type of reaction separates atoms or molecules into its individual components?
These are two metamorphic rocks. Which statement about the rocks is accurate? The rock on the right is foliated. The rock on the left formed from granite. The rock on the left is formed from cooled magma. The rock on the right has randomly arranged grains.

In cells, __________ are proteins that are needed to lower the amount of energy required to start chemical reactions.a. acids
b. enzymes
c. products
d. substrates

Answers

Answer:

b. enzymes

Explanation:

For any reaction to happen, an energy barrier must be crossed first. This is called as activation energy. Enzymes are biological catalysts that lower the activation energy for a reaction. As a result the reaction is started sooner and its rate is fast.

The substrate binds to the active site of enzyme to form a substrate-enzyme complex. The reaction takes place and product is formed also releasing the enzyme back so that it can be used again.  

The answers would be B.
Enzymes accelerate or catalyze ( slow or stop) chemical reactions. And enzymes are protein molecules.
While A, C, and D are not.

How do rates of mutation "power" molecular clocks?

Answers

Molecular clocks use rates of mutation to measure evolutionary time. Mutations add up at a fairly constant rate in the DNA of species that evolved from a common ancestor. The more mutations that happened in each lineage, the greater is the differences between these lineages.

Which of the following best shows how primary structure relates to protein function? a. High temperatures cause proteins to denature.
b. Changing one amino acid in the protein hemoglobin causes sickle-cell anemia.
c. Proteins are sensitive to changes in pH.
d. The shape and chemistry of an enzyme's active site determine its function.

Answers

A.) High temperatures cause proteins to denature.

Final answer:

The sequence of amino acids, or the primary structure, in a protein determines its shape and function. Changing one amino acid in hemoglobin results in sickle-cell anemia, showing that small alterations in the primary structure can have significant impacts on protein function.

Explanation:

The primary structure of a protein is important in determining its function. It refers to the sequence of amino acids that make up the protein chain. The option that illustrates this relationship is b. Changing one amino acid in the protein hemoglobin causes sickle-cell anemia.

This statement is valid because the amino acid sequence (primary structure) determines the shape the protein takes. In the case of hemoglobin, a single amino acid substitution causes a significant enough alteration in shape to result in the harmful condition of sickle-cell anemia, thus clearly showing the link between primary structure and protein function.

Learn more about Protein Structure and Function here:

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Of the three louse vectored pathogens here, which is or are unable to invade the insects gut and penetrate into its body cavity to grow and reproduce?

Answers

Three Louse Vectored Pathogens

Explanation:

  • The body louse , Pediculus humanus corporis, is the vector of three human pathogens such as   the operator of pandemic typhus  and Borrelia recurrentis and Rickettsia prowazekii,
  • The specialist of backsliding fever and Bartonella quintana, the operator of channel fever, bacillary angiomatosis, endocarditis, incessant bacteremia, and constant lymphadenopathy.
  • Mite borne ailments can be related with high rate of illness and demise, particularly scourge typhus and backsliding fever, which can be lethal in up to 40% of patients.
  • The ailments are for the most part common in individuals living in neediness and packed conditions, for instance, vagrants and those associated with war circumstances.

A dehydration synthesis reaction between glycerol and a single fatty acid would yield a(n)(a) micelle(b) omega-3 fatty acid(c) triglyceride(d)monoglyceride(e) diglyceride

Answers

Answer:

TRYGLYCERIDES

Explanation:

This is a macromolecule formed f rom CONDENSATION of Fatty acid and glycerol.

It result in formation of water molec from the loss of OH group from the glycerol and H ydrogen from the fatty acids.

The bond formed after condensation

Is ESTER BONDS.

Tryglycerides are hydrophipic.:water hating.

A dehydration synthesis reaction between glycerol and a single fatty acid would yield a monoglyceride.

In a dehydration synthesis reaction, also known as a condensation reaction, between glycerol and a single fatty acid, a monoglyceride is formed. Glycerol, a three-carbon alcohol, reacts with a fatty acid through the removal of water molecules. In this process, one hydroxyl group from glycerol combines with a carboxyl group from the fatty acid, resulting in the formation of an ester bond.

This ester linkage connects the glycerol molecule with the fatty acid, producing a monoglyceride. Unlike a triglyceride, which is formed when all three hydroxyl groups of glycerol react with fatty acids, a monoglyceride consists of a single fatty acid attached to the glycerol backbone. Monoglycerides are important molecules in lipid metabolism and can serve as intermediates in the synthesis and breakdown of more complex lipids in biological systems.

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If an enzyme is absent during polypeptide production, a mutation can occur. a. True
b. False

Answers

True. Protein enzymes are necessary to break polypeptide bonds. If they are absent within the cell mutations and abnormal cell growth would occur. Enzymes play a crucial role in balancing the cell's nutrients and overall processing of these nutrients that are available within and around the cell.