Answer the following question given this paragraph: Polyester molecules make excellent fibers and are used in many fabrics. A knitted polyester tube, which is biologically inert, can be used in surgery to repair or replace diseased sections of blood vessels. PET is used to make bottles for soda pop and other beverages. It is also formed into films called Mylar. When magnetically coated, Mylar tape is used in audio- and videocassettes. Synthetic arteries can be made from PET, polytetrafluoroethylene, and other polymers. Q: What is the name of film that polyester fibers form? Choices: - layers - fabric - Softness - mylar A:
mylar
Answer the following question given this paragraph: Figure 2.13 Oil and water do not mix. As this macro image of oil and water shows, oil does not dissolve in water but forms droplets instead. This is due to it being a nonpolar compound. (credit: Gautam Dogra). Q: What does oil do when mixed with water? Choices: - dissolves - precipitates - dissappears - forms droplets A:
forms droplets
Q: Answer the following question given this paragraph: When a sarcomere shortens, some regions shorten whereas others stay the same length. A sarcomere is defined as the distance between two consecutive Z discs or Z lines; when a muscle contracts, the distance between the Z discs is reduced. The H zonethe central region of the A zonecontains only thick filaments and is shortened during contraction. The I band contains only thin filaments and also shortens. The A band does not shortenit remains the same lengthbut A bands of different sarcomeres move closer together during contraction, eventually disappearing. Thin filaments are pulled by the thick filaments toward the center of the sarcomere until the Z discs approach the thick filaments. The zone of overlap, in which thin filaments and thick filaments occupy the same area, increases as the thin filaments move inward. Q: The distance between two consecutive z discs or z lines is called what? Choices: - contractile - ligule - radius - sarcomere A:
A: sarcomere
Question: Answer the following question given this paragraph: Enzymes increase the rate of chemical reactions by reducing the amount of activation energy needed for reactants to start reacting. One way this can happen is modeled in the Figure below . Enzymes aren't changed or used up in the reactions they catalyze, so they can be used to speed up the same reaction over and over again. Each enzyme is highly specific for the particular reaction is catalyzes, so enzymes are very effective. A reaction that would take many years to occur without its enzyme might occur in a split second with the enzyme. Enzymes are also very efficient, so waste products rarely form. Q: What can be used to accelerate the rate at which chemical reactions occur? Choices: - hormones - protein - components - enzymes A:
Answer: enzymes
*Question*
Answer the following question given this paragraph: The Golgi Apparatus The Golgi apparatus is responsible for sorting, modifying, and shipping off the products that come from the rough ER, much like a post-office. The Golgi apparatus looks like stacked flattened discs, almost like stacks of oddly shaped pancakes. Like the ER, these discs are membranous. The Golgi apparatus has two distinct sides, each with a different role. One side of the apparatus receives products in vesicles. These products are sorted through the apparatus, and then they are released from the opposite side after being repackaged into new vesicles. If the product is to be exported from the cell, the vesicle migrates to the cell surface and fuses to the cell membrane, and the cargo is secreted (Figure 3.15). Q: What "apparatus" is responsible for sorting, modifying, and shipping off the products that come from the rough endoplasmic reticulum? Choices: - plasma apparatus - receptor apparatus - secretion apparatus - golgi apparatus A:
**Answer**
golgi apparatus
Q: Answer the following question given this paragraph: Real gases deviate from ideal gases at high pressures and at low temperatures. Q: Real gases deviate from ideal form at high pressure and what other thermodynamic condition? Choices: - high winds - low pressure - high temperatures - low temperatures A:
A: low temperatures