HESI A2 BIOLOGY TEST 3

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HESI A2 BIOLOGY TEST 3

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -25 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: What are alleles?

Answer:

different variants of the same genes

Question 2: provide storage for the cell

Answer:

Vacuoles Question 3: What reads RNA produced in the nucleus and translate the genetic instructions provided to produce proteins.

Answer:

Ribosomes

Question 4: Transcription takes place where?

Answer:

in the nucleus Transcription is when the DNA in a gene is copied to produce an RNA

transcript called messenger RNA ( mRNA

• This is carried out by an enzyme called

RNA polymerase which uses available bases from the nucleus of the cell to form the mRNA.

Question 5: High specific heat

Answer:

requires a lot of heat to raise the temperature of 1 gram of water by 1 degree Celsius Question 6: contributes to protecting the cell outside elements, controls the passage of substances into and out of the cell, and engages in communication with other cells.

Answer:

cellular membrane Question 7: If a substance is moving across a plasma membrane against the concentration gradient, what type of transport is required?

Answer:

Active transport a protein moves the material across the membrane from a region of lower concentration to a higher concentration.

Question 8: What are the two categories of fatty acids?

Answer:

Saturated and unsaturated fat Question 9: Which of the following best describes the function of the Golgi apparatus?

Answer:

Transport proteins from the endoplasmic reticulum throughout the cell

Question 10: Contains the DNA of a cell

Answer:

Nucleus

Question 11: Biologic molecule component of the molecules of inheritance?

Answer:

Nucleic acids

Question 12: the digestive system of the cell

Answer:

Lysosomes Question 13: During which phase of cell reproduction do the cell's chromosomes become visibly separate with each duplicated chromosome having two sister chromatids?

Answer:

Prophase

Question 14: Gametes are formed by which process?

Answer:

Meiosis

Question 15: Why is polarity the most important characteristic of water?

Answer:

The benefits of polarity are hydrogen bonding, a high specific heat value, strong cohesive and adhesive properties, and its versatility as a solvent.Question 16: Which of the following organelles are responsible for producing energy for the cell?

Answer:

Mitochondrion and chloroplast -The mitochondrion is the powerhouse of most eukaryotic cells and is the site of cellular respiration.Chloroplasts are found in plants and are the site of photosynthesis.Question 17: Many cells uptake food through the cell membrane creating a food vacuole in a process known as

Answer:

phagocytosis

Question 18: What are the two primary products of photosynthesis?

Answer:

Sugar and oxygen Question 19: How do the results of sexual reproduction differ from asexual reproduction?

Answer:

In asexual reproduction one parent cell divides into two identical daughter cells; in sexual reproduction, two cells contribute genetic material resulting in significantly greater variation.

Question 20: What type of bond forms between base pairs in DNA?

Answer:

hydrogen Question 21: Membrane-enclosed organelles that contain an array of enzymes capable of breaking down all types of biological polymers-proteins, nucleic acids, carbohydrates, and lipids.

Answer:

Lysosomes

Question 22: Metabolic reactions in a cell progress from a standpoint of

Answer:

high energy to low energy Question 23: Equation that represents the simplified chemistry behind cellular respiration?

Answer:

C6 H12O6 + 6O2 ? 6CO2 + 6H2 O + ATP

The formula for cellular respiration is glucose plus oxygen produces carbon dioxide, water, and energy (ATP).Question 24: Cells with a high rate of protein synthesis generally have a large number of:

Answer:

Ribosomes