Biomolecules Questions and Answers

Biology opinion: is aerobic cellular respiration is simply the reverse of photosynthesis? elaborate reasoning with valid arguments in terms of carbon cycling, electron and energy flow 500 words please type no writing i cannot understand the handwrite

Determine the correct sequence of events during the creation of recombinant DNA. 1. Plasmid is cut open with enzymes II. Target gene is cut out with enzymes III. Plasmid is inserted into the bacterium IV. Target gene is bonded to the plasmid with Ligase A. II, I, IV, III B. I, II, III, IV C. IV, III, I, II D. IV, I, II, III

Which of the following is a clinical application of Kirby-Bauer Antibiotic Sensitivity Test? a. selecting the best chemotherapeutic drug for treating tumors. b. to reduce the nutritional requirements of harmful bacteria c. selecting the best antibiotics to treat patients with bacterial infections d. to directly reduce the incidence of antibiotic resistant bacteria

If a large clear zone is formed around an antibiotic disc placed on an agar plate, inoculated with bacteria. What does this indicate? a. The bacteria grow in an area on the plate where there were more nutrients. b. The antibiotics caused the bacteria, immediately around the disc, to mutate. c. The antibiotics killed the bacteria immediately around the disc. d. The bacteria is resistant to the antibiotic.

Which of the following best describes the action of catalase? a. Catalase combines water and oxygen to produce hydrogen peroxide. b. Catalase enables oxygen to accept electrons at the end of the electron transport respiratory chain. c. Catalase transports electrons out of the respiratory reaction. d. Catalase converts hydrogen peroxide into water and oxygen. e. Catalase reduces thiosulfate anion to hydrogen sulfide.

Which of the following is the basis of most of the organic matter on our planet? carbohydrates nucleic acids small molecules proteins lipids

What are some functions of lipids? Speeds up chemical reactions and builds structures in the body. store genetic information Long-term energy storage and water-proofing

What is the function of carbohydrates? energy source Speeds up chemical reactions and builds structures in the body. store genetic information

"function in humoral immunity, while function in cell-mediated immunity." "T cells, B cells" "B cells, T cells "Monocytes, Basophils" "Basophils, T cells" "B cells, neutrophils"

Super-premium brands of ice cream have up to ______% milk fat. 10 20 5 15

Bran is not a good source of fiber and minerals. True False

Gluten is formed from the combination of gliadin and glutenin. True False

Which of the following is true regarding new prescription drug orders: a. they must be filled promptly unless otherwise indicated b. they may be held until the Med Aide feels it is necessary. c. they may be called to the pharmacy by a Medication Aide d. they often do not work for the client and must be changed

Describe the classification of the R groups of the amino acids and provide an example of each class. What about the chemical nature of the R group puts them in the particular class?

In biotechnology what is the role of a vector? Give me two examples of vectors.

The Nile River is considered to be the longest river in the world. It is over 4,000 miles long. These sentences have been combined using an appositive phrase. Which sentence below punctuates the appositive phrase correctly? A. The Nile River, over 4,000 miles long, is considered to be the longest river in the world. B. The Nile River over 4,000 miles long, is considered to be the longest river in the world. C. The Nile River over 4,000 miles long is considered to be the longest river in the world.

What does Equiano think will happen to him when, as a child, he is brought on board the slave ship? A. He thinks he will be put in a cage. B. He thinks he will be sold. C. He thinks he will be eaten.

The tertiary structure of a protein refers to Active sites of enzymes Folding of chains due to amino acid interactions The number of amino acids in the protein The sequence of amino acids

The formula P = 14.7e -0.21x gives the average atmospheric pressure, P, in pounds per square inch, at an altitude x, in miles above sea level. Find the average atmospheric pressure for an altitude of 2.3 miles. Round your answer to the nearest tenth. 8.4 lb/in.2 9.1 lb/in.2 11.0 lb/in.2 7.8 lb/in.2

Each pH is logarithmically more or less than the one adjacent to it. What is the logarithmic difference between pH 10 and pH 5?

This passage describes a chemical reaction. Read the passage. Then, answer the question below. Over 200,000 miles of train tracks have been built in the United States since the early 1800s. Workers who build new train tracks often use a process called thermite welding to connect short pieces of metal track. This type of welding uses thermite powder, which is a mixture of aluminum metal (Al) and ferric oxide (Fe2O3). A worker places the powder between two pieces of track and burns it to form aluminum oxide (Al2O3) and iron metal (Fe). This process releases an enormous amount of energy that melts the two pieces of track together. In the chemical reaction described in the passage, which of the following are products? Select all that apply. ferric oxide (Fe₂O3) iron (Fe) aluminum (Al) aluminum oxide (Al₂O3)

Which of the following refers the tertiary structure of a protein? 1. The interactions between two polypeptide chains 2. The sequence of the amino acids of a peptide chain 3. The interactions between the backbone of a peptide chain in certain regions 4. The interactions between side chains of amino acids along the full length of a polypeptide chain

Which of the following are true due to the polarity of water? a) it is a good solvent for ions or other polar molecules b) it allows water molecules to stick to other water molecules due to hydrogen bond formation c) because of hydrogen bond formation, it allows water to resist temperature changes d) all of the above

Increasing temperature. has an unpredictable effect on has no effect on affects ecreases increases the rate of an enzymatic reaction.

Which of the following is the best definition of an atom? A. A positively charged particle B. A negatively charged particle C. The basic unit of all living things D. The basic unit of matter

Use the following list of molecules to answer the following four questions. A. Proteins B. Carbohydrates C. Nucleic acids D Lipids E Steroids 21. Includes molecules that function as cellular signals, receptors, enzymes, transporters, and carriers 22. Includes glycogen, chitin, cellulose, and glucose 23. Used for insulation and buoyancy in marine Arctic animals 24. Used to carry the genetic code

Lisa is working on a science project. Her task is to answer the question: "How do different brands of potting soil affect the growth rate of tomacco plants?" Describe how Lisa would perform this experiment. Identify the CONTROL group, INDEPENDENT, and DEPENDENT variables in your description. Identify some CONSTANTS Lisa should have in this experiment

The smaller the retention factor the more soluble an analyte is, True False

4. CSF stands for cerebrospinal fluid. This is the fluid which bathes the brain and spinal cord. Now, you are a doctor and you have a patient come into the emergency room with a fever and chills, as well as irritability, mental confusion, sensitivity to light, and the classic (for this disease) stiff neck. These are -CLASSIC- symptoms of a terrible pathogen causing bacterial meningitis. That is a bacteria infecting the brain directly. One of the ways we can diagnose this is by seeing large amounts of protein in the CSF. What test might you run to see if protein is present in a sample of CSF? [ Select] You run the test, and after the addition of the appropriate reagent, the color of the solution is blue. For this test, the result is [ Select] for protein.

Which cellular event might occur because of changes in enzyme structure when a cell is exposed to above-average temperatures? Cytoplasmic respiration would increase production of metabolic byproducts. Certain chemical reactions would stop functioning. Cellular energy demands would increase. Chromosomal acquired traits would become inherited traits.

Some people are unable to digest cow's milk because their bodies cannot carry out the biochemical reaction to break down the sugar in the milk. These people's bodies lack a substance that can be characterized as which of the following? A lipid An amino acid An enzyme A carbohydrate

Anabolic pathways build complicated molecules from simple ones. An example of anabolism would be: protein from amino acids pyruvate from glucose sugars from carbohydrates carbon dioxide from carbon and oxygen

Which of the following statements about Van der Waals forces are incorrect? Dipole-dipole bonds are found between polar molecules Water molecules are joined through hydrogen bonding London forces are the most common form of intermolecular bond and are found between all atoms and molecules The hydrogen bond is the weakest of the Van der waals forces

What is the most accurate way to measure the volume of an irregularly shaped object? drop it in a graduated cylinder with water in it and record the change of the water level put it on a balance after pressing "tare" put it on a balance before pressing "tare" measure the length of each side and convert to cubic centimeters

Unlike minerals such as iron and calcium, protein is a macronutrient in the human diet. Why is protein a macronutrient? A.The human diet should be made up of mostly protein. B.The human diet requires a relatively large amount of protein. C.Proteins are one of the few inorganic compounds that humans eat. D.Proteins are the most calorie-dense molecules that humans eat.

Which of the following best describes iron? It is important to the digestive system for the metabolism of fats. It is a part of hemoglobin which transports oxygen throughout the body. It is an important building block used to create muscle tissue. It is endocrine signaling molecule used to release hormones in the body.

As a scientist you were playing with carbohydrates in your lab. You noted that one of the compounds you were working with contained 5 carbon atoms. You knew right away that meant it must have ___ hydrogen atoms and ____ oxygen atoms. 5,5 10,5 5,10 2.5,5

Which of the following correctly describe intermolecular bonds: They are stronger than ionic and covalent bonds They are about the same strength as ionic and covalent bonds It is impossible to compare intermolecular bonds with ionic and covalent bonds They are weaker than ionic and covalent bonds

Why are populations with high levels of genetic diversity more stable than populations with low levels of genetic diversity? A. Populations with high levels of genetic diversity are more likely to have individuals with traits that help them survive if conditions change. B. Populations with high levels of genetic diversity are less likely to have high levels of variation in alleles. C. Populations with high levels of genetic diversity are less likely to interbreed with other populations. D. Populations with high levels of genetic diversity are more likely to have individuals that will undergo natural selection if conditions change.

The cardiovascular system of a newborn must be adjusted after the infant takes its first breath. Which of the following are true? The ductus arteriosus constricts and is converted to the ligamentum arteriosum. The foramen ovale between the atria of the fetal heart closes after the birth. The ductus venosus is disconnected at the severing of the umbilical cord and all visceral blood goes into the vena cava it becomes ligamentum venosum. All of the above statements are true

Select the correct answer from each drop-down menu. Proteins are macronutrients required for the function and regulation of all cells in the body. plant protein that provides the necessary ratios of all the to the body. an example of a complete

Which one of the following statements about the electron transport chain is false? a) The ETC involves the transfer of electrons between proteins embedded in the inner membrane of the mitochondria. b) The ETC pumps protons into the intermembrane space. c) The ETC produces ATP. d) The ETC creates a proton gradient.

Strong acids and strong bases do this when added to a solution: Dissociate (reak apart) completely Increase the acidity of the solution make the solution neutral Decrease the acidity of the solution

Students were given four small bottles marked "A," "B," "C," and "D." They were told that each bottle contained one of the following solutions: HNO3, NaOH, AgNO3, and CaCl2. Their assignment was to identify the contents of each bottle. The students tested a small amount of each solution with a piece of blue litmus paper moistened with distilled water. Only solution B turned the blue litmus paper red. Which solution was in the bottle marked "B"? CaCl₂ AgNO3 HNO3 NaOH

Which of the following is true for all exergonic reactions? A The products have more total energy than the reactants. B The reaction proceeds with a net release of free energy. C The reaction goes only in a forward direction: all reactants will be converted to products, but no products will be converted to reactants. D A net input of energy from the surroundings is required for the reactions to proceed. E The reactions are rapid.

The Andromeda Galaxy is approximately 1.5 x 1012 solar mass. Based on the passage, what is likely true about the Andromeda Galaxy? The galaxy's mass is composed of stars,gas, and dust. Over 1 x 10¹2 mass is probably made up of stars. Most of the galaxy's mass is probably made up of dark matter. Over half the galaxy's mass is probablymade up of gas and dust.

Quaternary structure is the folding of the polypeptides and non-amino acid based groups into the final protein conformation. What type of bonding is least commonly involved in stabilizing the quaternary structure of proteins? O ionic bonds O hydrogen bonding O covalent bonds O hydrophobic interactions

switch on enzyme activity, while can switch off or reduce enzyme activity. activators; Inhibitors Inhibitors; activators

Which of the following serve as enzymes? carbohydrates lipids nucleic acids proteins

When dissolved in water, acids release and bases release . hydrogen lons; hydroxyl Ions hydroxyl.lons: hydrogen Ions