31 Questions
Cholesterol plays a role in controlling fluidity and adding sturdiness to the membrane.
True
Sobrang titigas yung bilayer when there is too little cholesterol present.
False
Membrane Lipids are unipathic, consisting of 1 polar head and 2 nonpolar tails.
False
The hydrophobic part of a membrane lipid is composed of hydrocarbons.
True
Peripheral proteins are attached to both sides of the lipid bilayer.
False
Receptors on cell membranes can only interact with ligands and not viruses or bacteria.
False
The specific heat of water is 1.0 calorie per gram, which is lower than other liquids.
False
If the temperature of water changes rapidly, it can lead to climate change, flooding, and typhoons.
True
When we sweat, the warmer layer on top of the skin has high heat energy.
True
Water's high heat of vaporization means it vaporizes quickly compared to other liquids.
False
The cohesive behavior of water is due to its extensive network of hydrogen bonded molecules.
True
If you immerse a stem with flowers in colored dye, the color of the flower will not change after 10 minutes.
False
A single carbon atom is conductive and can conduct electricity.
False
Bucky balls, which are made up of many carbons grouped together, were synthesized more than 2 decades ago.
True
The octet rule states that an atom is stable when it has 6 electrons in its outermost shell.
False
In H2O, the unequal sharing of electrons results in hydrogen having a partial negative charge.
False
Carbon is considered stable when it has 8 electrons in its outermost shell.
True
Direction of arrows pointing towards oxygen in a molecule indicate polarity because oxygen is less electronegative.
False
Valence is defined as the number of electrons needed to make an atom stable and complete the 8 electrons in the outermost shell, following the octet rule.
True
Chitin, a fibrous substance in arthropod exoskeletons, is made up of monosaccharides.
False
Cellulose, found in plant cell walls, is made up of long chains of glucose molecules connected by ionic bonds.
False
Humans can digest cellulosic material easily due to the presence of specific enzymes.
False
Researchers have studied termites because they are interested in their ability to produce bioethanol.
False
The primary structure of proteins becomes functional as soon as it is synthesized.
False
Lipids are different from other macromolecules because they consist of repeating subunits like proteins and nucleic acids.
False
Most macromolecules are structural in nature, such as cellulose and chitin.
True
Cellulose is composed of layers or chains of alpha glucose.
False
Amylose and amylopectin are both components of starch.
True
Glycogen serves as a storage molecule for glucose in plant cells.
False
The addition of each monomer to form macromolecules occurs by the addition of a water molecule.
False
ATP provides the energy required to couple a monomer to a carrier molecule during polymerization.
True
Test your knowledge on the components and properties of the cell membrane, including transport proteins, glycolipids, glycoproteins, cholesterol, and phospholipids. Understand how cholesterol affects the fluidity and stability of the membrane, as well as the importance of selective permeability in regulating the entry and exit of molecules.
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