The site of enzymes directing the metabolic oxidation (respiration), ATP synthesis and considered as power house of cell are (A) Lysosomes (B) Microsomes (C) Mitochondria (D) Golgi apparatus Answer : (C) Mitochondria...
Are all genes expressed at the same time in all cell types? Answer : No- genes are expressed at different times or in different cells types. There are several sequences in DNA that regulate when a genes is transcribed, such as- promoters and enhancer ... to start transcription and operator sequences that allow for external proteins to cause activation or repression....
Isolation of cellular components to determine their chemical composition is called (A) Cell differentiation (B) Chromatography (C) Cell fractionation (D) All of these Answer : (C) Cell fractionation...
Substances insoluble in a membrane are carried across the membrane with the concentration gradient by means of a carrier molecule in a process known as: a) osmosis. b) diffusion. c) active transport. d) facilitated diffusion. Answer : ANSWER: D -- FACILITATED DIFFUSION....
Genes are able to control a cell's fate by determining the synthesis of: a) other genes b) enzymes c) carbohydrates d) fat Answer : ANSWER: B -- ENZYMES ...
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