Cell Energy IV Lowersixth Science Biology

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Challenging biology questions for 17-year-olds

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Cell Energy IV Lowersixth Science Biology


Froggy Jumps Cell Energy IV Lowersixth Science BiologyVersión en línea Challenging biology questions for 17-year-olds por YAKILI LMS 1 What primarily distinguishes absorption spectra from action spectra? a Absorption spectra relate to enzyme activity; action spectra relate to chlorophyll quantity. b Absorption spectra show pigment light absorption; action spectra show photosynthetic rate vs wavelen c Absorption spectra measure energy release; action spectra measure pigment color. 2 Which statement about absorption spectra is true? a They show the rate of respiration at different wavelengths. b They measure the rate of photosynthesis directly. c They plot how much light a pigment absorbs at each wavelength. 3 Which statement about action spectra is true? a They plot the rate of photosynthesis at different wavelengths. b They plot pigment concentration by wavelength. c They show adsorption of pigments on chromatography paper. 4 Which component is essential for chromatography to separate pigments? a Only a mobile phase b Only a stationary phase c A mobile phase and stationary phase 5 What is chromatographic paper primarily made of? a Protein matrix b Cotton fibers c Cellulose fibers 6 Which factor mainly affects chromatogram movement of pigments? a Paper thickness only b Ambient temperature only c Solvent polarity and pigment solubility 7 What is a chromatogram? a A record of separated substances on a chromatography medium b A device to measure light intensity c A type of genetic sequence 8 What does the Retention Factor (Rf) measure? a Light absorbance of pigment b Distance moved by pigment divided by solvent front distance c Rate of photosynthesis 9 Which equation defines Rf in chromatography? a Rf = pigment intensity / exposure time b Rf = distance travelled by substance / distance travelled by solvent front c Rf = pigment mass / solvent volume 10 Which statement about chromatography is correct? a Different pigments travel at different rates due to solubility and interactions b All pigments move the same distance c Only one pigment can be separated 11 In photosynthesis, what is the role of pigment excitation by light? a Destroys chlorophyll molecules b Inhibits electron flow c Excites electrons to higher energy levels enabling energy transfer 12 Which process converts light energy to chemical energy in photosynthesis? a Photophosphorylation and carbon fixation coupling b Oxidation of glucose c Fermentation 13 Which pigment is primarily involved in capturing light energy? a Hemoglobin b Carotene only c Chlorophyll a 14 What is the primary site of photosynthesis in plants? a Mitochondria in root cells b Nucleus of leaf cells c Chloroplasts in leaf mesophyll cells 15 What happens during light-dependent reactions? a Glucose is produced directly b Water is split and ATP/NADPH are produced c Oxygen is consumed to fuel reactions 16 Which gas is released during the light-dependent reaction? a Nitrogen gas b Oxygen c Carbon dioxide 17 Where does the light-dependent reaction occur? a Stroma only b Mitochondrial matrix c Thylakoid membranes of chloroplasts 18 What pigment primarily absorbs red and blue light for photosynthesis? a Chlorophyll b only b Carotenoids only c Chlorophyll a 19 Which process fixes CO2 into organic molecules? a Glycolysis b Krebs cycle c Calvin cycle (light-independent reactions) 20 Which enzyme catalyzes the first CO2 fixation in C3 plants? a ATP synthase b Ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) c Photosystem II 21 What is the main product of the Calvin cycle? a G3P (glyceraldehyde-3-phosphate) b Glucose c Oxygen gas 22 Which molecule is regenerated in the Calvin cycle? a NADP+ b RuBP c ADP 23 Which statement best describes the purpose of chromatography in biology? a To measure seed germination b To quantify chlorophyll breakdown c To separate plant pigments for analysis 24 Which pigments usually appear as bands on a chromatogram? a Proteins and lipids b Chlorophylls and carotenoids c Nucleic acids and sugars 25 What is a common solvent system for plant pigment chromatography? a Petroleum ether and acetone or similar mixtures b Water only c Heavy metals 26 In chromatography, what does a higher Rf value indicate? a The pigment absorbed more water b The pigment remained at origin c The pigment traveled farther from the origin 27 Which factor does not affect pigment separation by chromatography? a Pigment solubility b Solvent polarity c Ambient light during development 28 Which component is needed to measure photosynthesis rate directly? a O2 evolution or CO2 uptake b Water intake alone c Soil pH only 29 Which is a primary pigment in photosynthesis besides chlorophyll a? a Ribulose b ATP synthase c Chlorophyll b 30 What is the role of light in photosynthesis? a To excite electrons and drive energy transfers b To burn pigments c To decrease temperature 31 Which organelle contains pigments for photosynthesis? a Chloroplasts b Nucleus c Mitochondria 32 What is the main function of the light reactions? a Produce glucose directly b Generate ATP and NADPH for the Calvin cycle c Release CO2 33 Which gas is consumed in photosynthesis but released in respiration? a Oxygen b Hydrogen c Carbon dioxide 34 Which pigment is more non-polar and travels farther in paper chromatography? a Chlorophyll a b Carotenoids c Water 35 Which term describes the speed of a reaction under different wavelengths? a Absorption spectrum b Action spectrum c Retention spectrum 36 Where do pigments sit in a chromatogram? a As bands from the origin toward the solvent front b Only at the solvent front c Only at the origin 37 What is the first stable product of the Calvin cycle? a Pyruvate b G3P c ATP 38 Which condition favors better pigment separation in chromatography? a Very strong heat b Optimal solvent polarity and proper paper c No solvent at all 39 What is the primary energy carrier produced in light-dependent reactions? a FADH2 b ATP c NADH 40 What is the term for pigments used to broaden light absorption? a Proteins b Primary pigments only c Accessory pigments 41 Which compound is regenerated to continue the Calvin cycle? a G3P b ADP c RuBP 42 What happens to water during the light reactions? a It becomes glucose b It is reduced to water vapor c It is split to release O2 and electrons 43 Which factor can alter a chromatogram’s interpretation? a Color of the ruler used b Solvent purity and paper type c Time of day only 44 Which molecule carries electrons after light absorption? a ATP only b NADH c NADPH 45 Which is a component of a chromatogram analysis? a Sound waves b Peak positions of pigments c Peak temperatures 46 What is the primary source of CO2 for photosynthesis? a Soil moisture b Atmospheric CO2 c Water vapor 47 Which process directly uses light energy to form ATP? a Fermentation b Glycolysis c Photophosphorylation 48 The term 'retention factor' relates to which technique? a Chromatography b PCR c Spectrophotometry 49 Which pigment group absorbs blue and red light best? a Carotenoids only b Chlorophylls c Nucleic acids 50 What is the solvent front in chromatography? a Pigment band edge b Origin line only c The farthest point reached by the solvent

Cell Energy IV Lowersixth Science Biology

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Cell Energy IV Lowersixth Science BiologyVersión en línea

por YAKILI LMS

What primarily distinguishes absorption spectra from action spectra?

Which statement about absorption spectra is true?

Which statement about action spectra is true?

Which component is essential for chromatography to separate pigments?

What is chromatographic paper primarily made of?

Which factor mainly affects chromatogram movement of pigments?

What is a chromatogram?

What does the Retention Factor (Rf) measure?

Which equation defines Rf in chromatography?

Which statement about chromatography is correct?

In photosynthesis, what is the role of pigment excitation by light?

Which process converts light energy to chemical energy in photosynthesis?

Which pigment is primarily involved in capturing light energy?

What is the primary site of photosynthesis in plants?

What happens during light-dependent reactions?

Which gas is released during the light-dependent reaction?

Where does the light-dependent reaction occur?

What pigment primarily absorbs red and blue light for photosynthesis?

Which process fixes CO2 into organic molecules?

Which enzyme catalyzes the first CO2 fixation in C3 plants?

What is the main product of the Calvin cycle?

Which molecule is regenerated in the Calvin cycle?

Which statement best describes the purpose of chromatography in biology?

Which pigments usually appear as bands on a chromatogram?

What is a common solvent system for plant pigment chromatography?

In chromatography, what does a higher Rf value indicate?

Which factor does not affect pigment separation by chromatography?

Which component is needed to measure photosynthesis rate directly?

Which is a primary pigment in photosynthesis besides chlorophyll a?

What is the role of light in photosynthesis?

Which organelle contains pigments for photosynthesis?

What is the main function of the light reactions?

Which gas is consumed in photosynthesis but released in respiration?

Which pigment is more non-polar and travels farther in paper chromatography?

Which term describes the speed of a reaction under different wavelengths?

Where do pigments sit in a chromatogram?

What is the first stable product of the Calvin cycle?

Which condition favors better pigment separation in chromatography?

What is the primary energy carrier produced in light-dependent reactions?

What is the term for pigments used to broaden light absorption?

Which compound is regenerated to continue the Calvin cycle?

What happens to water during the light reactions?

Which factor can alter a chromatogram’s interpretation?

Which molecule carries electrons after light absorption?

Which is a component of a chromatogram analysis?

What is the primary source of CO2 for photosynthesis?

Which process directly uses light energy to form ATP?

The term 'retention factor' relates to which technique?

Which pigment group absorbs blue and red light best?

What is the solvent front in chromatography?