Award 1 for each pair of statements in a table, and 1 for any statement below the table. Draw a labelled diagram to show four DNA nucleotides, each with a different base, linked together in two strands. Explain the structure of the DNA double helix, including its subunits and the way in which they are bonded together. State a role for each of four different named enzymes in DNA replication. Explain briefly the advantages and disadvantages of the universality of the genetic code to humans.
These questions have appeared on recent IB examinations, exactly as shown below. Following each question is the markscheme answer which was used to evaluate student answers on the examination paper. Most of the DNA of a human cell is contained in the nucleus. Distinguish between unique and highly repetitive sequences in nuclear DNA.
Outline the structure of the nucleosomes in eukaryotic chromosomes. Explain the process of DNA replication. Do not accept letters alone. Describe the genetic code. Discuss the relationship between genes and polypeptides. Compare the processes of DNA replication and transcription. Outline the structure of tRNA. Outline the structure of a ribosome. Explain the process of translation.
Compare DNA transcription with translation.If you need practice questions at the end of your physics topic, this IS the 1 site. And it's FREE! Completely free access!! The new scale is intended to give a wider range of grades for students previously obtaining a C grade or higher. Over 1. Just find a topic you want to revise.
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Are you ready? Advertise Privacy Policy Terms.Hosted By. An object of mass 45 0 g moves in a circular path of radius 1. A mass of 1 5 kg is moving in a circular path at the end of a metal rod 4 m long.
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The axis of rotation passes through the other end of the rod and the plane of the motion is horizontal. Indicate clearly on the diagram the direction in which the mass will move if the rod breaks. Now consider a situation similar to the one described in the previous question but this time we have a rod 8 m long with a mass of 1 5 kg on each end.
A 20 0 g mass is moving in a circular path on the end of a light metal rod 0. The axis of rotation passes through the other end of the rod and the plane of the motion is vertical. Draw two diagrams showing the positions of the mass when the tension in the rod is i maximum and ii minimum. A body of mass 2 kg is attached to a string 1 m long and moves in a horizontal circle of radius 5 0 cm, as shown below.
At what angle should a road surface be banked in order that a vehicle can go round a bend of radius 5 5 m at a speed of 4 0 kmh - 1? Suppose that a vehicle attempts to go round this bend at 10 0 kmh If the coefficient of friction between the wheels of the vehicle and the road surface is 0.Please leave empty:.
Which phylum includes plants with rhizoids - spores produced in a capsule and a height below 0. DNA and proteins. DNA only. DNA and ribose. The diagram below shows a motor neuron. What are the structures indicated by X, Y and Z? See graph to select possible answers. Bacteria have a high rate of mutation. Bacteria assimilate antibiotics. Bacteria cell processes are blocked. Bacteria have a slow metabolic rate. To stimulate myogenic heart muscle contraction.
To block pacemaker activity. To secrete adrenaline to speed up the heart. To adjust heart rate to changing blood pressure. What can be predicted from the histogram comparing the mass of McIntosh apples and the mass of Gravenstein apples? See graph. The mass of the McIntosh apple has a smaller standard deviation than the Gravenstain apples. More fertiliser had been used to grow the McIntosh apples. The electronic balance used to obtain the data was only accurate to 5 grams.
What are the increasing levels of progesterone responsible for during the female menstrual cycle? Development of follicle.
Stimulating ovulation. Thickening of the endometrium. If a woman has three male offspring, what is the probability that her next child will be female? Pulmonary artery. Coronary vein. Vena cava. Pulmonary vein. Sample size.
What must be present for a human fetus to develop into a normal male? Which parts of this nucleotide would bond covalently with other nucleotides in a DNA double helix?This article sets out a seven-step process that you can use to make writing your IA that little bit easier.
The article that we will analyse in this example can be found here. Jenny is our lead IB Economics tutor.
Having taught the course for many years and worked as an examiner for the IBDP, she really knows what she is talking about! When she isn't tutoring, she loves exploring her native Berlin.
Your email address will not be published. Tutor applications Login. International Baccalaureate IB. Jenny Owl Tutor.
January 15th, Step 2 Highlight the relevant text for your application Step 3 Outline key terms to be defined. She said a plastic bag ban would help reinforce that message in the community.
It would also help clean things up. He often goes hunting for rabbits along the road. Bags and plastic foam clamshell boxes dot the landscape. He said most retailers have been receptive to the change. But those are expensive, and customers would have to pay for them. This summer the store handed out reusable bags hoping to target those customers. They were a hit. More about Jenny Jenny qualified as a teacher in Economics inand now works as a tutor with Owl Tutors.
View Jenny's Profile. More posts by Jenny. If you enjoyed this post, you may enjoy the following:.The free body diagram helps you understand and solve static and dynamic problem involving forces.
It is a diagram including all forces acting on a given object without the other object in the system. You need to first understand all the forces acting on the object and then represent these force by arrows in the direction of the force to be drawn.
Physics Problems with Solutions. What is a Free Body Diagram? Examples of Free Body Diagrams with Detailed Explanations Example 1 : A book on a table In this example, there are two forces acting on a book at rest on a table: 1 The weight W exerted by the earth on the book 2 The normal force N exerted by the table on the book. Example 2 : A suspended block In this example, there are two forces acting on the suspended block at rest: 1 The weight W exerted by the earth on the block 2 The tension force T exerted by the string or rope on the block.
Example 3 : A block on a floor with an acting force Fa to pull the block In this example, the block is being pulled and therefore a force of friction acts on the block.
So there are four forces acting on the block. Example 4 : A falling object In this example, there is only one force action on the falling object. Example 5 : An box on an incline plane with no frictions In this example, we assume that the inclined plane is frictionless; two forces act on the box: 1 The weight W exerted by the earth on the box.
N is normal to the inclined plane. Example 6 : An box on an incline plane with an acting force and friction considered In this example, a force Fa pulls the box upward and frictions are not negligible. Four forces act on the box: 1 The weight W exerted by the earth on the box. Example 7 : A block suspended to the ceiling using three strings A free body diagram for the block; two forces lower part of figure below 1 The weight W exerted by the earth on the box.
B free body diagram of point P; three forces upper part of figure below 1 Tension T 1 2 Tension T 2 3 Tension T 3 Example 8 : A system with two blocks, an inclined plane and a pulley A free body diagram for block m 1 left of figure below 1 The weight W 1 exerted by the earth on the box. B free body diagram of block m 2 right of figure below 1 The weight of the block W 2 2 Tension T '.
Privacy Policy.Periodic table with emission spectra. Hydrogen energy levels and line spectrum. Worksheet 1 - Isotopes and relative atomic mass. Worksheet 2 - Electrons, protons and neutrons. Worksheet 3 - Energy of waves. Worksheet 4 - Electron configuration.
Periodicity presentation. Instructions for assignment. File to use in assignment. General Features of transition metals chemistry. Further explanations on Complex ions. Transition metals lab. Displacement reactions of halogens.
Periodic properties - halogen displacement reactions. Carbon allotropes - 3D diagrams. Exercises Sig fig and uncertainty. From left to right, aqueous solutions of: cobalt II nitrate; potassium dichromate; potassium chromate; nickel II chloride; copper II sulfate; potassium permanganate.
Paula Daurat. Chemistry s yllabus Gas Laws. Worksheet 1 - formula mass. Worksheet 2 - empirical and molecular formula. Virtual spreadsheet gases 1.
How to Plan and Write an Economics Internal Assessment (IA)
Virtual lab: formula of a hydrate. Virtual lab: finding ratios. Virtual lab: gravimetric determination of arsenic. Video to get data Molar mass of a gas. Simulation Molar mass of vapor - Eduweblabs.
Formula of a hydrate.
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