Medicina e Chirurgia in lingua inglese, seconda parte

Elenco domande

1. Below are some steps involved in the production of transgenic plants. Which one of the following options gives a correct order for these steps?
2. Which option shows the structure in humans that produces bile and then the structure that stores bile?
3. The diagram shows the change in potential difference (pd) across the cell surface membrane of a sensory neurone. During which one of the phases (1–5) are the Na+ gates of the neurone open?
4. Which labelled structure on the diagram of the brain plays the major role in regulating the nervous control of heart rate?
5. Which row correctly identifies a nucleic acid NOT directly involved in transcription, and a nucleic acid which is NOT directly involved in translation?
6. In which of the following organelles do carbohydrates play a relevant role? 1 mitochondria 2 Golgi apparatus 3 chloroplasts
7. Which of the following are respiratory enzymes? 1 acetyl coenzyme A 2 FAD 3 reduced NAD
8. In the testes of a healthy man there are diploid cells that undergo meiosis to produce gametes. Which of the following statements is/are correct about meiosis for one of these diploid cells? 1 The diploid cell has doubled its DNA content before the start of meiosis I. 2 The cells at the start of meiosis II are diploid. 3 The total number of chromosomes produced by the end of meiosis II is double that of the original diploid cell.
9. Which of the following can be random processes? 1 genetic drift 2 mutations 3 artificial selection
10. Identify the number of protons (p), neutrons (n) and electrons (e) present in the ion:
11. How many unbranched straight chain molecules are there with the molecular formula C4H8F2, but with different structural formulas?
12. The diagram shows a uniform horizontal beam of negligible mass, 5.0 m long, placed on two supports, one at each end. It has a 300 N weight placed 1.0 m from one end and a 500 N weight placed 1.0 m from the other end. Both weights act vertically on the beam as shown in the diagram. What are the upward forces from the two supports acting on the beam?
13. A student has three 6.0 Ω resistors that can be connected together in any configuration. What are the maximum and minimum resistances that can be obtained by using one or more of these three resistors? [Assume the connections between the resistors have negligible resistance, the temperature of the resistors is constant, the resistors are used in a d.c. circuit and none of the resistors is shortcircuited.]
14. Which physical quantity can be measured in joules per metre?
15. A ball is projected vertically upwards and then falls back to its original position. Once projected, the ball experiences only a single force, downwards, due to a constant gravitational field strength of 10 N/kg. Here are three statements about the ball: 1 When the ball is moving upwards it loses kinetic energy and gains potential energy. 2 The magnitude of the ball’s acceleration increases as it falls. 3 No vertical forces act on the ball when it is at its maximum height. Which of the statement(s) is/are correct?