HESI A2 BIOLOGY, HESI A2 BIOLOGY V1V2 EXAM

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HESI A2 BIOLOGY, HESI A2 BIOLOGY V1/V2 EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -100 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: heterozygous

Answer:

if the alleles are different types

Question 2: codon

Answer:

every three bases along the stretch of mRNA

Question 3: metabolism

Answer:

sum of all chemical reactions that occur in an organism

Question 4: homozygous

Answer:

if both alleles are the same type

Question 5: mitosis

Answer:

process cells in the tip of a plant's root undergo to increase in number

Question 6: citric acid cycle (Krebs Cycle)

Answer:

-in step 2 the pyruvate is transported into a mitochondrion and used in the first of series of reactions -takes place in the mitochondria -two ATP molecules, 6 molecules of carbon dioxide and 6 NADH molecules are produced

Question 7: hierarchy of a dog example

Answer:

kingdom:

animalia

phylum:

chordata

class:

mammalia

order:

carnivora

family:

canidae

genus:

Canis

species:

lupus

Question 8: mRNA (messenger RNA)

Answer:

functions as a messenger from the original DNA helix in the nucleus to the ribosomes in the cytosol or on the rough er

Question 9: RNA ribonucleic acid

Answer:

used in transfer of information from DNA to protein level and as a messenger in most species of the genetic code

Question 10: cellular membrane

Answer:

-consist of a bilayer of phospholipids with proteins, cholesterol, and glycoproteins peppered throughout -phospholipids are amphipathic molecules, creating a hydrophobic region between the two layers making it selectively permeable

Question 11: lipids

Answer:

known as fats, but specifically they are fatty acids, phospholipids, and steroids

Question 12: How does water affect the temperature of a living thing?

Answer:

Water keeps temperature stable

Question 13: adhesion

Answer:

the ability of water to bond to or attract other molecules or substances (when water is sprayed onto the wall, some of it sticks to the wall)

Question 14: endoplasmic reticulum

Answer:

membranous organelle found attached to the nuclear membrane and consists of 2 continuous parts (smooth ER and rough ER)

Question 15: hierarchic organizational system

Answer:

kingdom, phylum, class, order, family, genius, species

Question 16: ribosomes

Answer:

organelles read the RNA produced in the nucleus and translate the genetic instructions to produce proteins -found attached to the endoplasmic reticulum (bound ribosomes) and the cytoplasm (free ribosomes)

Question 17: mitosis telophase

Answer:

chromosomes gather on each side of the now separating cell

Question 18: photosynthesis

Answer:

6CO2 + 6H2O + light --> C6H12O6 + 6O2

Question 19: glycolysis

Answer:

-first step of metabolism of food cellular energy is the conversion of glucose to pyruvate -takes place in the cytosol of the cell and produces two molecules of ATP, two molecules of pyruvate and two molecules of NADH

Question 20: Nucleic Acids

Answer:

-components of the molecules of inheritance -DNA and RNA

Question 21: aqueous

Answer:

water based

Question 22: Gregor Mendal

Answer:

discovered the basic of genetics; alleles

Question 23: plant reproductive system

Answer:

top: pistil

male reproductive parts (stamen) -anther -filament female reproductive parts (carpel) -stigma -style -ovary