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Bio exam Study Guide

Across
an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers
a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
a space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid.
an adaptor molecule composed of RNA, typically 76 to 90 nucleotides in length, that serves as the physical link between the mRNA and the amino acid sequence of proteins.
having two identical alleles of a particular gene or genes.
series of connected flattened sacs, part of a continuous membrane organelle within the cytoplasm of eukaryotic cells, that plays a central role in the synthesis of proteins.
ribonucleic acid, a nucleic acid present in all living cells
an organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane.
Ribosomal ribonucleic acid is a type of non-coding RNA which is the primary component of ribosomes, essential to all cells.
Down
a sequence of three nucleotides which together form a unit of genetic code in a DNA or RNA molecule.
a core biological process, occurring inside cells, balancing the loss of cellular proteins through the production of new proteins.
deoxyribonucleic acid, a self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.
a single-stranded RNA molecule that corresponds to the genetic sequence of a gene and is read by the ribosome in the process of producing a protein
(in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place.
having two different alleles of a particular gene or genes.
a minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.
a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants it consists mainly of cellulose.