Friday, December 11, 2009

Key Terms_ Chapter 9 to 13

Heredity (inheritance) - transmission of traits from one generation to next

Genetics - the scientific study of heredity

Clone - a group of genetically identical individuals

Gametes - reproductive cells

Somatic cells - any cell other than those involved in gamete formation

Karyotype - display of paired chromosomes (map of chromosomes)

Sex chromosomes - x and y, determine the sex

Autosomes - other chromosomes

Diploid cell - any cell with two chromosome sets (2n)

Haploid cell - any cell with a single chromosome set (n)

Autotrophs – self feeders

Heterotrophs – obtain their organic material by the second major mode of nutrition, unable to make their own food

Chlorophyll – the green pigment within chloroplasts

Mesophyll – the tissue in the interior of the leaf

Stroma – the dense fluid within the chloroplasts

Thylakoids – interconnected membranous sacs

Grana – thylakoid coumn

Photophosphorylation – adition of a phosphate group to ADP

Carbon fixation – initial incorporation of carbon into organic compounds

Wavelength – the distance between the crest of electromagnetic waves

Aerobic respiration – the most relevant and efficient catabolic pathway

Anaerobic – no O2

Cellular respiration – both aerobic and anaerobic processes

Oxidation – loss of electrons and energy

Oxidizing agent – the electron acceptor

Reduction – gain of electrons and energy

Reducing agent – the electron donor

NAD+ - electron carrier/acceptor, oxidizing agent in glycolisis

Chemiosmosis – energy-coupling mechanism

Fermentation – a way of harvesting chemical energy without using either oxygen or any ETC.

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