BIOLOGY AND CHEMISTRY HESI EXAM QUESTIONS

PDF Download

BIOLOGY AND CHEMISTRY HESI EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -99 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: The 2nd process associated with cell division

During this phase, which in separate from the phases of mitosis, the cell pinches in two, forming two separate identical cells.

Answer:

Sexual Reproduction

Question 2: transfer RNA (trna)

Answer:

Responsible for recognizing particular amino acids and adding them to the growing polypeptide chain in the order specified by the mRNA.

Question 3: energy must be used to produce glucose

Answer:

What two stages does photosynthesis consist of?

Question 4: Chromosomes

Answer:

-Contain all of the material for the regeneration of the cell, as well as all instructions for the function of the cell.

Question 5: Guanine bonds with who

Answer:

cytosine

Question 6: Metabolism

Answer:

-Is the sum of all chemical reactions that occur in an organism.-In a cell, reactions take place in a series of steps called metabolic pathways, progressing froma standpoint of high energy to low enery. All of the reactions are catalyzed by the use of enzymes.

Question 7: -Gregor mendel

-He observed traits in peas were passed from one generation to the next.

Answer:

alleles

Question 8: Nucleus

Answer:

-The first of the organelles which contains the DNA of the cell organized masses called chromosomes.

Question 9: Cells consist of many components called?

Answer:

Organelles

Question 10: stop codon

Answer:

UAG, UAA, or UGA; the codon that ends all RNA.

Question 11: Charles Darwin

Answer:

-First introduced the idea of evolution in 1859 in his book on the origin of species.-Current speciies arose from a process he called descent with modification .

Question 12: anaerobic repiration

Answer:

What molecule is used as the currecncy of the cell?

Question 13: Begins when chromosomes start to separate. In this phase chromatids are considered separate chromosomes.

Answer:

Telophase Question 14: Chromosomes gather on either side of the now separating cell. This is the end of mitosis.

Answer:

Cytokinesis Question 15: -A reproductive process that involves only one parent and produces offspring that are identical to the parent.-The offspring orginates from a single cell, yielding all cells produced to be identical.

Answer:

What are the two types of asexual reproduction?

Question 16: Atom

Answer:

Smallest unit of an element

Question 17: Conversion of light energy from the sun into chemical energy.

Answer:

energy is used to produce energy as

Question 18: Why does ice float?

Answer:

When water freezes, it forms a lattice, which actually causes the molecules to spread apart, resulting in the phenomenon of floating. Most molecules, when they are in the solid form, do not float on the liquid form of the substance. If ice did not float, lakes would freeze from the bottom to the top. Life could not exist as we know it.

Question 19: Lipids

Answer:

Are known as fats but specifically fatty acids, phospholipids, and steroids.

Question 20: What are the two types of cells ?

Answer:

-Prokaryotic -Eukaryotic

Question 21: Cohesion

Answer:

is the ability of a molecule to stay bonded or attracted to another moelecule of the same substance. ( ex.is how water tends to run together on a newly waxed car.) Question 22: In this process, the chromosome binds to the plasma membrane, where it replicates. Then as the cell grows, it pinches in two producing two idential cells.

Answer:

Mitosis

Question 23: Golgi Apparatus

Answer:

-Inside the cell is a packaging, processing, and shipping organeelle.-It transports materails from the ER throughout the cell

Question 24: Unsaturated fats

Answer:

-Have one or more double bonds in -Are liquid

Question 25: saturated carbs (lipids)

Answer:

solid bad Question 26: -The process that determines how reproductive cells divide in a sexually reproducing organism -Consists of two distinct stages, meiosis one and meiosis two resulting in four daughter cells.-Each of these daughter cells contains half as many chromosomes as the parent.-Preceding these events is a period called interphase. It is during interphase that the chromosomes are duplicated and the cell prepares for division.

Answer:

Who discovered the basic principles of genetics?