Btec Applied Science

Describe the function of the nucleolus Produces ribosomes and RNA Describe the function of the cell wall Provides rigidity and protection to the cell Describe the function of the chloroplasts Site of photosynthesis as they contain chlorophyll Describe the function of the plasmodesmata A channel through the cell wall the allows transport of materials from one cell to another Describe the function of the amyoplasts Stores starch and converts starch back into gluc...

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What is the function of the mitochondria? cellular respiration What is the function of the ribosomes? protein synthesis What is the function of the smooth endoplasmic reticulum? Synthesis and transport of lipids and carbohydrates What is the function of the Golgi apparatus? Modified and packaged proteins into vesicles for transport What is the function of the lysosomes? Digests old cell material and waste What is the function of the centrioles? Form int...

What are the standard units of mass, length and time? - Correct answer-Kilograms, metres and seconds What are the SI prefixes for 10^3, 10^6 and 10^9? - Correct answer-kilo, mega, giga What are the SI prefixes for 10^-3, 10^-6 and 10^-9? - Correct answer-milli, micro, nano What is work done? - Correct answer-The energy transferred in moving something What is power? - Correct answer-the rate at which work is done What happens to a gas when it is compressed? - Correct answer-Particles get cl...

What is a covalent bond? - Answer A covalent bond is a chemical bond that occurs when one or more electron is shared between the atoms. all intermolecular forces are much weaker than covalent bonds. True or False - Answer True. What are three types of intermolecular forces - Answer London dispersion, dipole-dipole, hydrogen bonding What are London dispersion forces? - Answer The intermolecular attractions resulting from the constant motion of electrons. What is a dipole-dipol...

Atomic radius - Answer Size of the atom. Decreases in size with increasing protons or if atom loses electrons (cation) Increases in size with more shells or if atom gains electrons (anion). First Ionisation energy - Answer The energy needed to remove one mole of electrons from an atom in its gaseous atom First ionisation energy down groups - Answer Decreases More shells = more shielding = weaker attraction = easier (less energy) to lose one electron First ionisation ener...

What are proteins made of? - Answer Polypeptide chains = amino acids linked together by peptide bonds Condensation reaction - Answer a chemical reaction in which two or more molecules (amino acids) combine to produce & lose water Dipeptide - Answer 2 amino acids bonded together by a peptide bond Polypeptide - Answer A chain of many amino acids linked together by peptide bonds. Enzymes - Answer proteins that act as biological catalysts catalyst - Answer substance that s...

What is the function of the mitochondria? cellular respiration What is the function of the ribosomes? protein synthesis What is the function of the smooth endoplasmic reticulum? Synthesis and transport of lipids and carbohydrates What is the function of the Golgi apparatus? Modified and packaged proteins into vesicles for transport What is the function of the lysosomes? Digests old cell material and waste What is the function of the centrioles? Form into ...

Bias - Answer Inclination of prejudice in a way considered to be unfair Economic Issue - Answer Related to the best use of limited, or scarce resources Environmental Issue - Answer Related to the harmful effects of human activity on the environment Ethical issue - Answer Ethically related aspects that may have affected how research was carried out Implication - Answer Effects or consequences of an action that may happen, although not explicitly stated Influence - An...

Diffusion - Answer the process by which molecules move down a concentration gradient = area of higher concentration to an area of lower concentration dynamic equilibrium - Answer a state of balance between continuing processes = don't change the concentration Particles spread evenly what happens when more molecules added? - Answer faster rate of diffusion why? bigger concentration gradient why is diffusion passive? - Answer No energy input needed Diffusion across a mem...