HESI A2 BIOLOGY 2024 EXAM QUESTIONS

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HESI A2 BIOLOGY 2024 EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -61 Questions and Answers -format set of multiple-choice -Expert- Explanation

Question 1: what are 4 important macromelcules

Answer:

lipids, proteins, nucelic acids and carbs

Question 2: How are phospholipids arranged in the cell membrane?

Answer:

The membrane interior is composed of the hydrophobic fatty acid components of both layers of phospholipids

Question 3: what nucletoide does RNA have that DNA doesnt

Answer:

uracil (instead of thyamine)

Question 4: what does NAD do

Answer:

bring electrons from krebs and glycosis to ETC

Question 5: covalent bonds

Answer:

hydrogen is a weak bond between hydrogen and ANOTHER negative atom on another molecule

Question 6: whats a centriole

Answer:

a minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.

Question 7: What is produced in the Krebs cycle?

Answer:

4CO2, 2 ATP, 6 NADH and 2 FADH2.reducing agent of NADH

Question 8: What is pintocytosis?

Answer:

A form of bulk transport across the plasma membrane. Cell "drinking", uptake of extracellular fluid containing various solutes such as protein and sugars. Uptake is formed with the aid of a coat protein.Uptake is non-selective

Question 9: genotype vs phenotype

Answer:

-Genotype : Collection of alleles

-Phenotype : Physical expression of alleles

Question 10: what is a glial cell

Answer:

brain Supportive cells. Don't send electrical signals.

Question 11: densities in water

Answer:

water, ice, gas from high to low

Question 12: why is cellular respiration an oxidative reaction?

Answer:

loses electrons (hydrogen specifally)

Question 13: what can in crease of lactic acid in the body lead to

Answer:

cramping

Question 14: where is acetychol a from

Answer:

carbs, fats and protein

Question 15: Endosymbiosis

Answer:

symbitoic relationship in which organism lives in another

Question 16: active vs passive transport

Answer:

active needs energy; passive does not need energy (diffusion)

Question 17: Smooth Endoplasmic Reticulum

Answer:

creates and stores lipids

NO RIBOSOMES

Question 18: What is oxidative phosphorylation?

Answer:

Uses energy released by the electron transport chain to power ATP synthesis. and makes 32 ATP

Question 19: How many cells does mitosis produce?

Answer:

• diploid cells- 2 identical daughter cells

46 chromosomes makes body cells

Question 20: What are anabolic pathways?

Answer:

Anabolic pathways require energy to synthesize larger molecules.

Question 21: what is water polarity

Answer:

there are positive and negative electrons which make it attractive to other molecules

Question 22: difference between zygote and embryo

Answer:

zygote is the first development stage of the baby embryo is right after

Question 23: satu vs unsatu triglycerides

Answer:

satu is single bonds unsatu is double and more healthy

Question 24: glycogen

Answer:

carbohydrate saved in liver and muscle tissue to break down later for energy

Question 25: what is needed for fermentation to make ATP

Answer:

adequate amount of NAD+

Question 26: what is DNA tranlsation

Answer:

protein production and DNA is not used

Question 27: which organelle is used mainly in cellular respiration

Answer:

mitochondrion