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Exam 1, 2 & 3 Bio 121 Review Questions and Correct Answers CA$12.98   Add to cart
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Exam 1, 2 & 3 Bio 121 Review Questions and Correct Answers
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  • BIO 121

A covalent chemical bond is one in which ... Outer - shell electrons of two atoms are shared to satisfactory fill the valence Difference between covalent bonds and ionic bonds Covalent bonds involve the sharing of bonds between atoms. Ionic bonds are electrical attraction - positively and negative...

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  • August 13, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • exam 1 2 3 bio 121 review questions and correct
  • a covalent chemical bond is one in which oute
  • difference between covalent bonds and ionic bonds

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  • BIO 121
  • BIO 121

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Exam 1, 2 & 3 Bio 121 Review Questions
and Correct Answers
A covalent chemical bond is one in which ... ✅Outer - shell electrons of two atoms are
shared to satisfactory fill the valence

Difference between covalent bonds and ionic bonds ✅Covalent bonds involve the
sharing of bonds between atoms. Ionic bonds are electrical attraction - positively and
negatively charged

Which bond or interaction would be least likely to dissociate(break up) when a
compound is put into water? ✅Hydrogen and ionic bonds
- Least likely is covalent bonds -

Biological evolution of life on Earth, from single prokaryote-like cells to large,
multicellular eukaryotic organisms... ✅has occurred in accordance with the laws of
thermodynamics

Carbon on the periodic table. How many covalent bonds do you think an atom of
nitrogen is likely to form? ✅3

Most similar to sodium in regard to chemical reactivity ... ✅potassium

Liquid water's high specific heat is mainly a consequence of the ... ✅absorption and
release of heat when hydrogen bonds break and form

Type of bond that must be broken for water to vaporize ... ✅Hydrogen bond

Why does ice float in liquid water ? ✅Hydrogen bonds stabilize and keep the
molecules further apart

A fish swimming in salt water ... ✅- Fish's cells will be constantly losing water to the
environment via osmosis
- Fish will likely have active transport to transport salt

One liter of a solution of pH 2 has how many more hydrogen ions than 1 liter of a
solution of pH 6 ? ✅10,000 time more

A beaker has 100 ml of NaOH at pH 13. Pours 10 ml of HCL at pH 1. What are the
results of the mixing? ✅The pH of the beaker's contents will fall

, NOT a correct statement regarding enzymes ... ✅Enzymes INCREASE the activation
energy of reactions in living cells

NOT a polymer ... ✅Glucose

A molecule with the chemical formula C6H12O6 is probably a ... ✅Carbohydrate and
monosaccharide

Lactose (sugar in milk), is composed of one glucose molecule joined by a glycosidic
linkage to one galactose molecule. How is lactose classified? ✅As a disaccharide

NOT True about saturated fats? ✅They have multiple double bonds in the carbon
chains of their fatty acids

Hydrogenated vegetable oil is a major ingredient. What is the result of adding hydrogen
to vegetable oil? ✅Stays solid at room temperature

Particular polypeptide was found to contain 100 amino acids. How many peptide bonds
are present? ✅- 99 (always have one less)

Aspects of protein structure are stabilized or assisted by hydrogen bonds ... ✅Not
primary - but secondary, tertiary and quaternary

Filed of view on a microscope is said to be 4mm at 40X magnification. Approx. size?
✅.1 cm

Tertiary structure of a protein ? ✅Unique three-dimensional shape of the fully folded
polypeptide

Normal hemoglobin is a tetramer, consisting of two molecules of B hemoglobin and two
molecules of hemoglobin. In sickle-cell disease, as a result of a single amino acid
change, the mutant hemoglobin tetramer associate with each other and assemble into
larger fibers. Based on this information alone, we can conclude that sickle-cell
hemoglobin exhibits ... ✅Altered primary and quaternary structure

Which of the following descriptions best fit the type of molecules known as nucleotides ?
✅A nitrogenous base, a phosphate group and pentose sugar

Not apart of a prokaryotic cell ... ✅an endoplasmic reticulum

The evolution of eukaryotic cells most likely involved ... ✅endosymbiosis of an aerobic
bacterium in a larger host cell - evolved into mitochondria

Where does glycolysis takes place in eukaryotic cells ? ✅Cytosol

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