FREE Bachelor of Science: Life, Physical, and Chemical Questions and Answers

Question 1

Which of the following organ systems, if it were to become dysfunctional (or even fail), would have the most immediate impact on how you would experience and react to the rest of the body being dysfunctional as a result?

Accepted Answer

Nervous

Answer

The nervous system is the body's primary control and communication network, responsible for coordinating all voluntary and involuntary actions and transmitting signals throughout the body. Its immediate dysfunction would profoundly impair sensory perception, motor control, and the regulation of vital functions, causing the most rapid and widespread impact on how an individual experiences and reacts to any other bodily dysfunction. Other systems, while crucial, typically have a less immediate and pervasive impact on overall body function.

Question 2

Which key dogma mechanism explains how RNA strands are converted into amino acids?

Accepted Answer

Translation

Answer

Translation is the fundamental process in molecular biology where the genetic information encoded in messenger RNA (mRNA) is decoded to synthesize proteins. During translation, ribosomes read the mRNA sequence in three-nucleotide units called codons, and transfer RNA (tRNA) molecules bring the corresponding amino acids to form a polypeptide chain. This mechanism effectively converts the genetic code from RNA into the sequence of amino acids that make up a protein.

Question 3

A huge rocky object circling the sun with craters on its surface and mostly composed of nickel and iron would fall into what category according to scientists?

Accepted Answer

Meteorite

Answer

The description of a 'huge rocky object... mostly composed of nickel and iron' with 'craters on its surface' strongly points to the characteristics of a meteorite. While an object 'circling the sun' is technically an asteroid, many meteorites are fragments of asteroids that share these same compositional and surface features. Scientists classify such recovered extraterrestrial rocks based on these material properties, making 'meteorite' the appropriate category for this type of object when examined.

Question 4

Imagine that you exerted a force on a 13 kilogram item, forcing it to accelerate at a velocity of 0.5 m/s2. How many times would the force being applied to this item need to be multiplied in order to achieve an acceleration of up to 1.25 m/s2?

Accepted Answer

2.5

Answer

This problem uses Newton's second law, F = ma. First, calculate the initial force: F1 = 13 kg × 0.5 m/s² = 6.5 N. Next, calculate the new force needed for the desired acceleration: F2 = 13 kg × 1.25 m/s² = 16.25 N. To find the multiplication factor, divide the new force by the initial force: 16.25 N / 6.5 N = 2.5.

Question 5

Imagine that the force keeping the ball in the air in this picture is coming from outside of you (such as a person holding it). What would occur to the ball if they dropped it?

Accepted Answer

It would convert its potential energy into kinetic energy.

Answer

When a ball is held in the air, it possesses gravitational potential energy due to its height above the ground. As the ball is dropped, its height decreases, causing this stored potential energy to be converted into kinetic energy, which is the energy of motion. This conversion results in the ball accelerating downwards and gaining speed as it falls.

BS - Bachelor of Science Practice Test

BS - Bachelor of Science Practice Test

FREE Bachelor of Science: Life, Physical, and Chemical Questions and Answers