2016年11月IB生物SL真题下载-Paper1
1. Which feature of striated muscle cells allows them to be considered as a possible exception to the cell theory?
A. They are found in multicellular organisms.
B. They contain more than one nucleus.
C. They are specialized for movement.
D. They do not carry out mitosis.
2. Which characteristic of stem cells makes them useful for treating Stargardt’s disease?
A. They can differentiate into retinal cells.
B. They are readily available from especially created embryos.
C. They transport white blood cells to the eyes.
D. They divide by binary fission so provide sufficient cells.
3. The cell membrane model proposed by Davson–Danielli was a phospholipid bilayer sandwiched between two layers of globular protein. Which evidence led to the acceptance of the Singer–Nicolson model?
A. The orientation of the hydrophilic phospholipid heads towards the proteins
B. The formation of a hydrophobic region on the surface of the membrane
C. The placement of integral and peripheral proteins in the membrane
D. The interactions due to amphipathic properties of phospholipids
4. What provides evidence for the endosymbiotic theory?
A. Mitochondrial DNA in eukaryotic cells
B. 70S ribosomes in prokaryotic cells
C. Gene transfer from prokaryotic cells to eukaryotic cells using plasmids
D. Prokaryotic cells (Escherichia coli ) in the large intestine digest proteins
5. Which mitotic phase is labelled X in the micrograph of an onion (Allium cepa) root tip?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
6. Which type of reaction is the breakdown of starch into sugars?
A. Denaturation
B. Reduction
C. Catabolic
D. Condensation
7. The diagram shows a molecular structure.
Which type of molecule is shown?
A. Amino acid
B. Lipid
C. Carbohydrate
D. Nucleotide
8. Which properties explain the ability of water to dissolve solutes?
- I. Polarity of water molecules
- II. High specific heat capacity of water
- III. Hydrogen bonding
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
9. A fever in a normally healthy adult during an illness is not usually a problem and can be regarded as a defence mechanism. However, a fever higher than 41 °C might be dangerous. What is the cause of the possible damage due to a high fever?
A. Loss of body mass
B. Muscle damage due to shivering
C. Overactive metabolic enzymes
D. Spread of infection
10. What is a similarity between DNA and RNA?
A. Both are polymers of nucleotides.
B. Both are composed of antiparallel strands.
C. Both contain adenine, cytosine and thymine.
D. Both contain ribose sugar.
2016年11月IB生物SL真题余下省略！
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