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Biology Exam Questions and Answers (Q&A)

A solution of PH = 2.5 (Acidic) should have a high concentration of H+ molecules

2 Answers

Why is olive oil Saturated fat? I thought that is unsaturated because is liquid at room temperature.

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There are many differences between reactants and products. A reactant is the process of one chemical substance turning into another chemical substance. They are broken down during reactions and used up over time as the reaction progresses.This process is very important to daily life.

Examples of reactants include burning fuel to provide energy for vehicles, as well as water evaporating, which products rain. Products are the result of a reaant. Though they work together to create reactions, reactants is the start of the reaction and products are what are produced from the reaction. The formula of a chemical reaction is Reactants -> Products.

1 Answer

The option that RNA has five bases whereas DNA only has four bases, is not a difference between DNA and RNA. DNA stands for Deoxyribonucleic acid, and it is a molecule that contains the genetic code which is used for the growth and development of organisms.

It also controls all the functioning and reproduction of all the organisms that are living. Deoxyribonucleic acid and Ribonucleic acid both are nucleic acids, along with fats, carbohydrates that are complex, and proteins also. There are two stands in DNA that are known as polynucleotides because they are made up of simple monomer units.

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The vaccine for children abbreviated by MMR stands for Measles, Mumps, and Rubella. These are the three diseases that the vaccine protects its recipients against. Children generally receive the first dose of this vaccine around 9 to 15 months of age, and then the second dose around 15 months to 6 years of age. There must be at least 4 weeks between doses in order for the vaccine to be most effective.

Measles, mumps, and rubella are all very serious viral diseases; measles is a highly infectious respiratory disease with a red rash that spreads over the body. Mumps affects the saliva-producing (salivary) glands, and rubella also causes a rash and other complications.

1 Answer

The correct answer to this question is B. If you do a Punnett Square for the genotypes AA and Aa, the results are two AA genotypes and two Aa genotypes. A Punnett Square does not tell you how many offspring will result from a mating situation, so answer A is false.

Finally, because only one of the genotypes contains a lowercase "a," it is not possible to get the result of aa (making C false). Had the two genotypes been Aa and Aa or aa and aa, then offspring with a genotype of aa is possible.

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In my biology review the answer says 4-6 days

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A triple beam balance is a tool used to measure mass very precisely. The device has a reading error of +/-0.05 gram. The name cites the three beams including the central beam, which indicates the different size of the beams. The triple beam balance is utilized to measure mass directly from the objects, find mass by difference for liquid, and measure out a substance.

The three beams on a triple beam balance function independently to assess the size of an object. Placed on each beam is a weighted rider which you move along the beam to verify the object's size. A triple beam balance allows greater accuracy than a spring scale in determining the mass of objects in grams.

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The force exerted is equal to the mass of the object and the distance it needs to travel. This is one of the first laws of physics and unfortunately against a giraffe. A giraffe has a long neck and his brain rests in his head all the way up there. His heart need to pump with an extraordinary force in order to deliver the blood to his head. This is very difficult making the giraffe susceptible to heart diseases.

A problem may compromise the supply leading to the death of the giraffe, something that is prevented by the immense size of the giraffe heart.

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A geen organelle containing chlorophyll which are used in photosynthesis

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