Biology 2

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Chapter 1:
May/June 06
1 What is the resolution, in nanometres, of an electron microscope and of a light microscope?

electron microscope
light microscope
2 The diagram shows a drawing of an electron micrograph of a cell.

Which structures are surrounded by double membranes?

Golgi apparatus




3 In which animal cells would Golgi apparatus be most abundant? A ciliated epithelial cells
B goblet cells
C red blood cells
D smooth muscle cells
5 Which is a feature of all prokaryotic cells?

A absence of cell surface membrane
B division by mitosis
C presence of mitochondria
D presence of ribosomes

6 The diagram shows a cell surface membrane. The lipid bilayer has an approximate width of 8nm.

How many times has the diagram been magnified?
A 2.5 × 102 B 2.5 × 104 C 2.5 × 106 D 2.5 × 108

May/June 07
1 The diameter of living cells varies considerably. Typical diameters are: A prokaryote, such as Streptococcus - 750nm
A eukaryotic cell, such as a white blood cell - 15µm
Given these measurements, the diameter of the white blood cell is how many times greater than the prokaryote? A x 2 B x 20 C x 50 D x 200
2 In constructing a plan diagram of a transverse section of a dicotyledonous leaf, which feature should not be included? A chloroplasts in the palisade mesophyll layer
B cuticle on the upper epidermis
C vascular bundles in the leaf lamina
D xylem in the vascular bundles
3 Membranous sacs containing products of metabolism are formed by the endoplasmic reticulum in cells. Where are these products used? A inside and outside the cell
B inside lysosomes only
C inside the cell only
D outside the cell only
4 The diagram shows a graduated slide, with divisions of 0.1 mm viewed using an eyepiece graticule.

Pollen grains were grown in a sugar solution and viewed using the eyepiece graticule. Diagram 1 shows the pollen grains at first and diagram 2 shows them after four hours. diagram 1 diagram 2

What is the growth rate of the pollen tubes?
A 5µmh–1 B 10µmh–1 C 5 mmh–1 D 10 mmh–1

5 In 1985, a giant bacterium, Epulopiscium fishelsoni, was discovered. Which cell structure(s) would be present in Epulopiscium enabling biologists to classify this organism as prokaryotic?

A a cellulose cell wall outside the plasma membrane
B a pair of centrioles close to the nuclear area
C circular DNA lying free in the cytoplasm
D smooth endoplasmic reticulum throughout the cytoplasm

May/June 08

1 What is the order of size of cell components?

largest smallest

centrioles mitochondria lysosomes nucleoli

mitochondria nucleoli lysosomes centrioles

nucleoli mitochondria centrioles lysosomes

nucleoli centrioles mitochondria lysosomes

2 When mucus is secreted from a goblet cell in the trachea, these events take place.

1 addition of carbohydrate to protein
2 fusion of the vesicle with the plasma membrane
3 secretion of a glycoprotein
4 separation of a vesicle from the Golgi apparatus

What is the sequence in which these events take place?
A 1 → 4 → 2 → 3
B 1 → 4 → 3 → 2
C 4 → 1 → 2 → 3
D 4 → 1 → 3 → 2

3 The magnification of this electron micrograph is 5 × 103.

What is the actual size of the nucleolus?
A 0.2µm B 0.5µm C 2µm D 20µm
4 Which structure is present in cells of eukaryotes but not present in cells of prokaryotes? A 70s ribosome
B chromatin
C mesosome
D plasmid
5 A piece of mammalian tissue was homogenised and subjected to differential centrifugation to yield four subcellular fractions....