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P&A Cells

Heather

Intro to P&A -cells -cell cycle -plasma membrane

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Across
3.The nucleotide base which pairs with guanine
6.The inside of the cell which is composed of organelles and cytosol
9.The proteins within the chromatin which control the expression of genes
11.Sugars which are attached to lipids
13.Cells which do not reproduce (such as nerve, muscle, pancreas and kidney cells) are said to remain in this phase
14.The final stage of mitosis where the cell physically splits into two daughter cells
15.The elaborate network of rods in the cytosol which support the shape of the cell and generate movement within the cell
16.The nucleotide base which pairs with thymine
17.The outer layer of the cell
18.The type of bond which joins nucleotide bases
19.The plasma membrane of the cell is described as having this type of model
20.The process of DNA to pre-mRNA to mRNA
21.The fourth stage of mitosis in which the cytoplasm starts to divide
24.The process of creating an amino acid polypeptide strand from mRNA
28.A series of membranes which are studded with ribosomes which manufacture and pack proteins
30.The carrier RNA which transfers the required amino acid to the ribosome for translation
31.A vesicle which contains oxidase enzymes which detoxify harmful substances such as free radicals
34.DNA sequences on the ends of chromosomes which limit the amount of times that a cell can divide
35.Intracellular structures
37.The non-coding part of DNA
40.What does RNA stand for?
41.The powerhouse of the cell which is shaped like nutrigrain cereal
44.The second stage of mitosis in which the chromosomes line up at the cell's equator
50.The condensed form of chromatin which have the characteristic X shape
51.The fuzzy sugar coating on the cell
52.The fluid which surrounds the organelles within the cell (forms part of the cytoplasm)
53.The basic subunit of DNA is composed of a phophate, pentose sugar and a base
54.The 2 globular protein organelle which manufactures proteins
55.Where translation takes place
56.Programmed cell death which is important during foetal development and for elimination of excessive, old or damaged cells
57.A piece of DNA which codes for a specific protein
58.The third stage of mitosis in which the chromosomes are pulled apart
Down
1.Errors in the DNA strand
2.The nucleotide base which pairs with adenine
4.A continuation of the rough endoplasmic reticulum which is not studded with ribosomes
5.This type of protein is located within the plasma membrane
7.This type of protein is loosely attached to the inner or outer surface of the plasma membrane
8.Sugars which are attached to proteins
10.The outer membrane of the nucleus
12.What does DNA stand for?
13.The nucleotide base which pairs with cytosine
22.The epigenetic marker which switches gene expression ON
23.DNA is often described as having this structure
24.This type of integral protein spans the width of the plasma membrane
25.The phase of the cell cycle in which the cell spends the majority of its time
26.A series of flattened sacs which modify and package proteins produced in the endoplasmic reticulum
27.The lipid molecule which stabilises and regulates the fluidity of the plasma membrane
29.Another name for cell division
32.The coding part of DNA
33.The control centre of the cell which contains the DNA
36.The hydrophilic heads of the phospholipid molecules have this property
38.The hydrophobic tails of the phospholipid molecules have this property
39.A restriction point which allows or denies progression into the S phase
42.The epigenetic marker which switches gene expression OFF
43.The dark staining body within the nucleus
45.The first stage of mitosis in which the chromosomes duplicate
46.A vesicle which contains acidic digestive enzymes which is involved in digesting foreign particles and old worn out cell components
47.The enzyme which helps to lengthen shortening telomeres. AKA the immortality enzyme
48.Where transcription takes place
49.Another name for the unorganised DNA and histones in the nucleus

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