QUESTION 1 Oxygen, carbon dioxide, and other small molecules
QUESTION 1 Oxygen, carbon dioxide, and other small molecules cross the plasma membrane through the process of ____.a. osmosisb. facilitated diffusionc. endocytosis and exocytosisd. active transporte. diffusion4 points QUESTION 2 The minimum amount of energy needed to get a chemical reaction started is called the ____ energy.a. chemicalb. activationc. enzymaticd. reactione. triggering4 points QUESTION 3 A series of enzyme-mediated reactions by which cells build, remodel, or break down organic molecules is known as ____.a. the induced-fit modelb. intermediary compoundsc. energy carriersd. metabolic pathwayse. activation4 points QUESTION 4 The sodium-potassium pump is an example of ____.a. active transportb. osmosisc. facilitated diffusiond. simple diffusione. bulk flow4 points QUESTION 5 What happens to a molecule when it is phosphorylated?a. It gains electrons.b. It loses electrons and protons.c. It receives a phosphate group.d. It loses energy.e. It becomes denatured.4 points QUESTION 6In which cellular organelle does photosynthesis take place?a. chloroplastsb. lysosomec. rough endoplasmic reticulumd. Golgi bodiese. mitochondria4 points QUESTION 7 In animals, when ATP concentrations are high, glucose is converted into ____.a. glycogenb.starchc. glycerold. carbon dioxidee. pyruvate4 points QUESTION 8Photosynthesis converts the energy of light into ____.a. chemical bond energyb. pigmentsc. carbohydratesd. heat energye. electrons and protons4 points QUESTION 9 In the light-dependent reactions of photosynthesis, how do hydrogen ions get back into the stroma?a. passive diffusion through ATP synthaseb. active transport across the thylakoid membranec. passive diffusion directly across the thylakoid membraned. active transport through ATP synthase4 points QUESTION 10When glucose is used as the energy source, the largest amount of ATP is produced in ____.a. the Krebs cycleb. acetyl-CoA formationc. electron transfer phosphorylationd. fermentatione. glycolysisQUESTION 1The majority of DNA in a cell that has undergone differentiation is _____.a. turned offb. transcribedc. hydrolyzedd. mutated e. translated 4 points QUESTION 2The connection point of two sister chromatids is called the _____.a. centromereb. centrosomec. chromatind. chromatide. centriole4 points QUESTION 3In the nucleotide sequence ACTGG, what does C stand for?a. cytotoxicb. cytosinec. cysteined. chargaffe. cytoplasm4 points QUESTION 4In animal cells, ____ is/are usually a one-way path.a. translationb. transcriptionc. replicationd. replication and translatione. differentiation4 points QUESTION 5The structure of a DNA molecule is analogous to a _____.a. coiled springb. paper clipc. forkd. laddere. rope4 points QUESTION 6Transcription starts at a region of DNA called a(n) _____.a. transcriberb. terminatorc. promoterd. activatore. sequencer4 points QUESTION 7What is an anticodon?a. the region of the mRNA that base pairs with the tRNAb. the region of the mRNA that codes for an amino acidc. the region of the tRNA that base pairs with the mRNAd. the region of DNA that base pairs with the codone. the region of DNA that codes for the codon4 points QUESTION 8Which of the following carries amino acids to ribosomes?a. hnRNAb. all of thesec. mRNAd. rRNAe. tRNA4 points QUESTION 9Which process is responsible for the conversion of DNA information into messenger RNA?a. duplicationb. transcriptionc. replicationd. translatione. synthesis4 points QUESTION 10Translation stops when _____.a. one of the three stop codons is encounteredb. enzymes attach to the mRNA molecule at the end of the transcriptc. stop codon tRNAs add guanine caps to the newly formed peptided. the cell runs out of tRNAe. a certain number of codons have been read
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