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Biology Grade 9 Unit 3: Cells

national exam questions have come from this unit. It runs 30 pages; one careful study pass takes about 3.2 hours, and its difficulty is easier among Biology units. Each section below lists the questions set from it, with the year, and opens the page that teaches it.

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3.2 Cell theory · read p. 45

2010 E.C., Q3 – Who was the first person who believed to have seen moving cells under a microscope?

3.3 Cell structure and function · read p. 46

2018 E.C., Q10 – Which of the following is NOT a characteristic of bacteria?
2016 E.C., Q98 – This item is based on the following table about the function of cellular organelles. No Features Organelles Mitochondria Golgi body Lysosomes Ribosomes 1 The site of protein synthesis NO YES NO YES 2 Modifies and distrib
2013 E.C., Q71 – Which of the following is a correct match of cellular organelles and their corresponding function?
2012 E.C., Q14 – Among the parts of the cell, which organelles are bounded with Double membrane?
2012 E.C., Q15 – Why are cells that secrete hormones and enzymes rich in rough endoplasmic reticulum? Because they produce more:
2011 E.C., Q88 – Which of the following happens if a nucleolus is missing in a cell?
2011 E.C., Q52 – Which of the following is NOT a function of lysosomes?
2011 E.C., Q23 – If a homogenate of eukaryotic cells is spun in a centrifuge, which of the cellular organelles settles out first?
2011 E.C., Q51 – Organelles in the cytoplasm that are known as 'power house' of the cell are:
2010 E.C., Q57 – The organelle of the cell which is concerned with the synthesis of lipids in addition to being associated with carbohydrate metabolism and detoxification is:
2010 E.C., Q42 – Cell organelles that contain hydrolytic enzymes are called:
2010 E.C., Q21 – Which of the following organelles settles out last when homogenized cells are centrifuged?
2010 E.C., Q43 – Which part of the cell makes necessary changes packages and secretes proteins?
2009 E.C., Q25 – If a cell fails to form lysosomes, which of the following cellular functions will get disturbed first?
2007 E.C., Q22 – Which of the following is NOT true about mitochondria and chloroplasts?
2007 E.C., Q66 – Which of the following will primarily happen if the enzymes in the lysosomes of a cell are defective?
2007 E.C., Q27 – Among the following scientists who contributed to the cell theory, identify the one who stated that a cell can arise only from another cell like it.
2007 E.C., Q31 – Which of the following factor determines the rate at which organelle settle out of cell homogenate if spun in a centrifuge?
2006 E.C., Q44 – Which one of the following eukaryotic cell organelles was a free living cell before eukaryotic cells evolved?
2006 E.C., Q65 – If a cell fails to clear its cellular debris which one of its organelle is most likely NOT functioning?
2006 E.C., Q6 – Which of the following structures is NOT present in animal cells?
2005 E.C., Q39 – In which of the following features are eukaryotic cells distinguished from prokaryotic cells?
2005 E.C., Q30 – Which of the following is an important function of the Golgi apparatus?
2005 E.C., Q13 – Which unit is best to use for measuring the smallest cells and organelles?
2005 E.C., Q23 – If a suspension of a mixture of cellular organelle is spun in a centrifuge, which organelle settles to the bottom first?
2005 E.C., Q52 – Which of the following paired organelle are membrane-bound?

3.4 Types of cells · read p. 53

Not asked in a national paper yet.

3.5 Animal and plant cells · read p. 54

Not asked in a national paper yet.

3.6 Observing cells under a microscope · read p. 56

2017 E.C., Q3 – A grade 12 student marked two dots close to each other using a pen on a piece of paper and observed them under a microscope. The two dots appeared well separated under the microscope. This was due to
2016 E.C., Q15 – A student focused a slide of an onion epidermal cell on pre-estimated width of 2 millimeter field of view under a microscope. What will be the width of each individual cell if you count 8 cells that fit to the field of v
2015 E.C., Q48 – A grade nine student has planned to study animal cells using a compound light microscope. She prepared a slide of stained human cheek cells for this purpose. Which one of the following activities should she first do?
2014 E.C., Q37 – The importance of stains in microscopic investigations is explained by their effect in
2010 E.C., Q1 – Which of the following tools is used by a biologist to study the internal anatomy of experimental animals?
2008 E.C., Q42 – Which of the following parts of the plant cell is NOT a living component of the cell?
2006 E.C., Q2 – Which one of the following cellular forms did Robert Hooke observe under his crude microscope?

3.7 The cell and its environment · read p. 59

Not asked in a national paper yet.

3.7.1 Passive transport · read p. 59

2017 E.C., Q5 – A biology teacher grouped his students in to two groups and ordered group I to place a slice of potato in hypertonic solution and group II in hypotonic solution. What will happen to the potato slice in group I and group
2016 E.C., Q99 – Potato slices of equal weighed were immersed in four different concentrations of salt solutions. The solutions were 1.5, 1.0, 0.5, and 0.1 molars. After a day, the potato slices were reweighed. Which potato slice weights
2016 E.C., Q100 – Suppose you took a container and divided it into two halves by a membrane which is permeable to water and divided the two halves as "A" and "B". Finally, you added hypertonic solution in "A" and hypotonic solution in "B"
2016 E.C., Q89 – How does oxygen is transported in the human body? It is transported
2015 E.C., Q50 – A plant cell is placed in a solution which has lower solute concentration than its contents. After a few minutes the cell will become
2015 E.C., Q8 – Suppose a hypothetical cell of 15% solute concentration is put in a beaker containing 90% water and 10% solute. In which way will the water move?
2014 E.C., Q90 – Consider the following table which shows a result of an experiment where red blood cells were placed in three different solutions X, Y and Z. Solutions Changes observed on RBCs X Shrink Y Burst Z No change The three diff
2013 E.C., Q64 – Three different cells are in the process of transporting materials across the cell membrane as indicated below: Na+ Cell 1 = water from high concentration to low concentration Cell 2 = from high concentration to low conc
2013 E.C., Q65 – Suppose you took a container and divided it into two halves by a membrane which is permeable to water and labeled the two halves as A and B. Finally, you added hypertonic solution in A and hypotonic solution in B. What w
2012 E.C., Q17 – If potato cells are immersed in a hypertonic solution, they will
2010 E.C., Q74 – Which of the following is NOT a requirement for a molecule to directly diffuse across the cell membrane?
2009 E.C., Q14 – What happens when a plant cell absorbs in more water?
2009 E.C., Q66 – What happens when human red blood cell are kept in a hypertonic solution ?
2008 E.C., Q13 – What is the best term that expresses the movement of substances in cells against their concentration gradient?
2007 E.C., Q28 – Which of the following modes of transport is used by cell to move substance against their concentration gradients?
2006 E.C., Q87 – Which of the following will happen if a plant cell is kept in a solution that is stronger than its protoplasms?
2006 E.C., Q82 – In which of the following solutions does an animal cell undergo hemolysis?
2005 E.C., Q40 – What will happen if human red biood cells are kept in a hypotonic solution
2005 E.C., Q73 – If red blood cells shrink when placed in a certain solution ,what is the strength of the solution relative to the strength of the protoplasm of the cells?
2005 E.C., Q51 – In which type of solution is the water potential more negative than in the cells?

3.7.2 Active transport · read p. 68

2018 E.C., Q26 – Which of the following is responsible for the movement of water from the roots to the leaves in plants?
2017 E.C., Q26 – Which of the following is correct about the movement of water in plants? It moves
2017 E.C., Q4 – From the following alternatives select the common features that are found both in animal and plant cells.
2015 E.C., Q49 – Which one of the following is true about plant cells? They have
2015 E.C., Q53 – Which one of the following statements correctly describes the movement of materials in plants?
2014 E.C., Q80 – The movement of water from the roots up to the top leaves of tall trees is carried out by
2009 E.C., Q23 – Which of the following organelles is common to both plant and animal cells?
2008 E.C., Q37 – Which of the following has a bigger size than all the other?
2007 E.C., Q23 – What dose it mean when biologists express the cell membrane as a unit membrane?
2006 E.C., Q24 – Which of the following cellular structures is possessed by all cells

3.8 Levels of Biological Organization · read p. 68

Not asked in a national paper yet.