Answer the following question given this paragraph: Four interactions stabilize the tertiary structure of a protein: (a) ionic bonding, (b) hydrogen bonding, (c) disulfide linkages, and (d) dispersion forces. When a protein contains more than one polypeptide chain, each chain is called asubunit. The arrangement of multiple subunits represents a fourth level of structure, the quaternary structure of a protein. Hemoglobin, with four polypeptide chains or subunits, is the most frequently cited example of a protein having quaternary structure Saylor URL: http://www. saylor. org/books. Q: Hemoglobin, with four polypeptide chains or subunits, is the most frequently cited example of a protein having what kind of structure? Choices: - binary - unary - ternary - quaternary A:
quaternary
Answer the following question given this paragraph: Figure 13.13 The Cerebellum The cerebellum is situated on the posterior surface of the brain stem. Descending input from the cerebellum enters through the large white matter structure of the pons. Ascending input from the periphery and spinal cord enters through the fibers of the inferior olive. Output goes to the midbrain, which sends a descending signal to the spinal cord. Q: The cerebellum is associated with what major human organ? Choices: - bladder - liver - heart - brain A:
brain
Q: Answer the following question given this paragraph: All of the outer planets have numerous moons. They also have planetary rings made of dust and other small particles. Only the rings of Saturn can be easily seen from Earth. Q: The rings of what planet can be easily seen from earth? Choices: - Venus - jupiter - Neptune - saturn A:
A: saturn
Question: Answer the following question given this paragraph: Early land plants also evolved a dominant sporophyte generation. Sporophytes are diploid, so they have two copies of each gene. This gives them a "back-up" copy in case of mutation. This was important for coping with the strong solar radiation and higher risk of mutations on land. Q: What does it mean to be a diploid organism? Choices: - yolk has two copies of each gene - taproot has two copies of each gene - micelles have two copies of each gene - organism has two copies of each gene A:
Answer: organism has two copies of each gene
*Question*
Answer the following question given this paragraph: Vertebrates have a backbone, but invertebrates do not. Except for the chordates, all animal phyla consist only of invertebrates. Chordates include both vertebrates and invertebrates. Q: What do vertebrates have which invertebrates do not? Choices: - appendages - fangs - tails - backbones A:
**Answer**
backbones
*Question*
Answer the following question given this paragraph: Exercise and Stretching When exercising, it is important to first warm up the muscles. Stretching pulls on the muscle fibers and it also results in an increased blood flow to the muscles being worked. Without a proper warm-up, it is possible that you may either damage some of the muscle fibers or pull a tendon. A pulled tendon, regardless of location, results in pain, swelling, and diminished function; if it is moderate to severe, the injury could immobilize you for an extended period. Recall the discussion about muscles crossing joints to create movement. Most of the joints you use during exercise are synovial joints, which have synovial fluid in the joint space between two bones. Exercise and stretching may also have a beneficial effect on synovial joints. Synovial fluid is a thin, but viscous film with the consistency of egg whites. When you first get up and start moving, your joints feel stiff for a number of reasons. After proper stretching and warm-up, the synovial fluid may become less viscous, allowing for better joint function. Q: What fluid becomes less viscous, allowing for better joint function after stretching? Choices: - proximal - vertebral - cranial - synovial A:
**Answer**
synovial