Here are the Short Answer Questions for 2015 Biology Exam Paper. The Answers are provided at the end of the Post. Check the other post for Part A: Multiple Choice Questions a) Which structure shown in the cell above makes it hard for herbivores to digest? (1) b) i) Name two (2) of the three (3) important raw materials needed by plants for photosynthesis. (2) ii) Ions and minerals enter plants via root hairs and roots. Explain how these ions and minerals are then absorbed by the rest of the plant. (2) c) Explain how oxygen is produced as a by-product of photosynthesis. (2) QUESTION 34 a) i) Name the structure(s) in the lungs responsible for efficient gaseous exchange. (1) ii) By referring to your answer in i) above, explain how the structure suits the function. (2) b) Amphibians use internal nares to breathe on the land. How do they breathe when in damp places, for example, in a pond? Explain. (2) c) The isomers of galactose and glucose are both monosaccharaides. In cellular respiration, the human body only recognises glucose and not galactose. How will cellular respiration proceed if only galactose is present? (1) d) Name the process by which sugars are burned in cells to generate overall energy. (1) QUESTION 35 a) In humans, sometimes the sugar level drops below the normal levels and something has to be done to bring the sugar level back to normal levels. Name the hormone that does that and explain how it does so. (2) b) i) If the Schwann cells wrapped around a motor axon are damaged, what would be the likely result? (2) ii) The brain receives information from which part of the peripheral nervous system? (1) c) A farmer is desperate to sell his freshly harvested raw bananas at a local food and vegetable market. He is faced with the problem that the bananas are not ready. Name the plant hormone that would solve his problem. (1) d) The bananas were harvested from plants growing in complete shade. What type of tropism are they reflecting? (1) QUESTION 39
a) Fill in the blanks with the most correct word. A gene that codes for a characteristic is made up of two different copies called _______________. One copy is dominant to the other and controls a character that is expressed. Expressed characters are called _______________. (2) b) A nucleotide is made up of a base, a phosphate and a ______________. The bases are of four (4) types, in DNA uracil is replaced by ________________. (2) c) In sexually reproducing organisms, crossing over is a process that results in the varieties of differences observed. Explain the term crossing-over. (2) d) Restriction enzymes are used to cut DNA into smaller fragments. What are enzymes? (1)
4 Comments
11/13/2021 01:00:43 am
easy questions, but atleast next time try to put answers at the end for us to see if we are correct or not
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2/1/2023 03:05:41 am
يعتبر السيراميك من أكثر المواد العازلة المستخدمة في صنع مكوك الفضاء ، حتى يخترق الغلاف الجوي ويتحمل الحرارة والضغط المرتفعين
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elbiet
2/8/2024 01:33:44 am
مما لا شك فيه أن المواد الخرسانية تمتص الحرارة ، لذلك هناك عدد من المواد المنتجة للاستخدام في العزل الحراري ، وأصبحت هذه المواد منتشرة على نطاق واسع. الصوف الصخري: على شكل ألواح ملتصقة بالسطح ، أو بلاط موزاييك يحتوي على نسبة عالية من الصوف الحجري. طريقة أخرى هي لفة من الصوف الحجري الخام ، والتي تنتشر على كامل مساحة السطح ، ثم يتم سكب طبقة من الخرسانة عليها. مادة البيرلايت: وهي مادة معدنية متعددة الأوجه وباهظة الثمن ماديا ، وهي من المواد المستخدمة في العزل الحراري ، حيث تنتشر على السطح بطريقة خاصة أو توضع مع الخرسانة ، حيث تعمل هذه المادة على عكس الحرارة ، وتعمل أيضا كمواد عازلة للصوت. قد لا يخلو السطح العازل للسقف من الرطوبة من الشقوق التي يخترق الماء من خلالها السقف ويسبب الرطوبة. هذه هي واحدة من أكثر القضايا إشكالية التي تنشأ في المنزل ، ومن كيفية تسرب المياه من السقف. صفائح البيتومين: وهي عبارة عن صفائح تحتوي على مادة البوتامين ، حيث يتم تثبيتها
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Biology Exam Questions and PapersWe at PNG Education News site would like to help students who are doing Year 11 and 12 at the Upper Secondary Schools by publishing exam like Questions. We will post questions in Biology on this Section. Categories
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