Sphingolipids serve what function in biological systems? A) energy storage B) cell membrane components C) hormones D) vitamins E) energy source
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- 42. Phospholipids can form all the following structures in a water environment except? chloroplasts b) bilayers c) Chromosomes d) Endoplasmic reticulum e) nuclear membraneWhich one of the following is an enzyme? Question 3 options: A) glucose B) cholesterol C) phospholipid D) β-galactosidaseWhy are proteoglycans like airbags?
- In eukaryotes, fatty acids are stored as triglycerides in cells that have A) Golgi that store fatty acids B) too little atp C) Lysosomes that synthesize glycogen from excess glucose D) Liposomes that contain an enzyme that performs dehydration synthesis E) mRNA that makes amino acids in to fat Explain whyWhich of the following is abundantly found in collagen? a) Tryptophan b) Alanine c) Glycine d) SerineCan someone see if I have done this correct? a) beta-glucose b) beta-galactose c) I dont know?? d) N-acetylglucoamine e) Fructose
- Steroids such as Estrogen or Testosterone are lipids which are found in the cytoplasm of living cells. They can pass across (dissolve in) the proto cell and prokaryote phospholipid bilayer because they: a) perform dehydration synthesis, b) dissolve in water, c) are ionic, d) they a soluble in the Fatty Acids of the bilayer, e) none are true.32. The antimetabolites inhibit: a) the ribosome assembly b) the ribosome movement c) cell respiration d) glycolysis e) the Krebs cycle4. The use of ATP to move substances across a plasma membrane of a cell occurs in a) facilitated diffusion b) simple diffusion c) osmosis d) active transport 5. Which of the following is NOT true concerning enzymes? a) they increase the rate at which a reaction proceeds b) enzymes are specific for their substrates c) enzyme names usually end with the suffix “-ase” d) since an enzyme is modified by a reaction, a given enzyme molecule can be used only once 6. DNA is replicated during what part of the cell cycle? a) S phase b) mitosis c) meiosis d) cytokinesis
- Question 14 Secondary protein structure occurs due to: a) hydrogen bonding b) ionic bonding c) covalent bonding d) hydrophobic interactions e) all of the above Question 15 A substance binds to a receptor on the cell membrane. Several moments later the substance can be found inside a vesicle inside the cell. This is an example of: a) exocytosis b) phagocytosis c) pinocytosis d) receptor-mediated endocytosis e) regulated secretion Question 16 ( Why is olive oil a liquid and lard a solid at room temperature? A) atoms of the lard are held together by ionic bonds B) olive oil is unsaturated, while lard is a saturated fat C) some of the carbon bonds in lard are double bonds D) oil has more non-polar bondsSuppose that liver cells were placed into a bowl containing hypotonic solution. What would you observe? Question options: a) The liver cells would lyse or burst. b) The liver cells would remain the same in both their size and their shape. c) The liver cells would start to generate more intermediate filaments for cellular protection. d) The liver cells would begin to initiate cholesterol synthesis. e) The liver cells would shrivel or crenate.Which of the following statements regarding adenosine phosphates is incorrect? a) ATP, ADP and AMP are all examples of adenosine phosphates. b) All adenosine phosphates contain a pentose ribose sugar. c) All phosphate ions in adenosine phosphates are joint together by a phosphoanhydride bond. d) All adenosine phosphates releases energy upon cleavage of phosphate group.