# Search results

1. ### Rate Law Homework Problem

i meant Rate=k [Ce4+]^2 [Tl+] for the uncatalyzed reaction
2. ### Rate Law Homework Problem

Homework Statement Cerium and thallium ions react as follows: 2Ce4+ (aq) + Tl+ (aq) ---> 2Ce3+ (aq) + Tl3+ (aq) This reaction is very slow and is thought to occur in a single elementary step. The reaction is catalyzed by the addition of Mn2+(aq) according to the following mechanism...

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7. ### Recombination Freq.: Genetic Mapping Hwk Problem

Thanks for the explanation!
8. ### DNA Sequencing hwk problem

Homework Statement A DNA strand with the sequence 3' GTGAACTGC 5' is complementary to the sequence Choose one answer. a. 5' GTGAACTGC 3' b. 3' GACGTTACA 5' c. 3' GCAGTTCAC 5' d. 5' GCACTTCAC 3' . Homework Equations 3' GTGAACTGC 5' 5' CACTTGACG 3' The...
9. ### Recombination Freq.: Genetic Mapping Hwk Problem

Homework Statement The recombination frequency between gene “Q” and gene “Z” is found to be 23.5%. The recombination frequency between “Q” and a third gene “R” is 10%. The frequency of recombination between “Z” and “R” is 13.5%. Which one of the following is NOT true concerning these three...
10. ### DNA base pairing calculation

Homework Statement If a double-stranded segment of DNA has been found to have 23 purines and 15 thymines, how many guanines are there? Homework Equations purines are adenine and guanine...adenine and thymine should be equal amounts. So, there are 15 adenines. Out of the 23 purines...
11. ### Biology Genetics: DNA & mRNA sequencing

Homework Statement A portion of DNA has the sequence 3' TTGACGC 5'. The sequence of RNA that is transcribed from this sequence is Choose one answer. a. 3' UUCAGCG 5' b. 5' AACUGCG 3' c. 5' AACTGCG 3' d. 5' GCGUCAA 3' Homework Equations 3' TTGACGC 5' 5'...
12. ### Homework on ribosomes help

Homework Statement The process of transcription Choose one answer. a. takes place on ribosomes. b. occurs only in eukaryotic cells. c. can only produce messenger RNA molecules. d. builds an RNA strand in the 5' to 3' direction. Homework Equations...
13. ### Biology Genetics: Mapping and Recombinant Frequency

Thanks....i actually forgot to put all of the progeny in the denominator...(205+195+1263+1196)

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15. ### Biology Genetics: Mapping and Recombinant Frequency

Homework Statement Two homozygous plants are crossed and all offspring (F1) are yellow with long stems. A cross of the offspring (F1)produces the following phenotypes in the F2 generation: 1,263 yellow, long stem 1,196 white, short stem 205 yellow, short stem 195 white, long stem...
16. ### Biology Genetics polygenic inheritance & probability

1. Homework Statement Height is a characteristic resulting from polygenic inheritance. If genes at four loci code for height, what is the probability that parents with the genotypes RrSSTtUu and RrSsTtUU will have a child possessing 8 tall alleles? Choose one answer. a. 1/128 b...

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18. ### Biology Genetics: Colorblindness and Blood Type

thanks for the explanation...i understand it even better now!!
19. ### Biology Genetics dihybrid cross

thanks so much....just wanted to be sure!!
20. ### Biology Genetics: Colorblindness and Blood Type

1. Homework Statement A colorblind man with blood type AB marries a woman with normal vision and blood type A who is heterozygous for both traits. What are the odds of having a daughter that is colorblind and has blood type A? 2. Homework Equations Xc Y IA IB x XC Xc IA i 3...
21. ### Biology Genetics Hwk Problem

[b]1. Homework Statement Crossing an individual who is homozygous dominant for a trait with an individual whose genotype is unknown will most likely produce which set of offspring? [b]2. Homework Equations DD x ? DD x Dd DD x DD DD x dd [b]3. The Attempt at a Solution...
22. ### Biology Genetics dihybrid cross

[b]1. Homework Statement In an organism, two separate genes influence the length of the hair. The allele for long hair, L, dominates the allele for short hair, l. The allele for hair, H, dominates the hairless allele, h. In the cross between parents of genotype LlHh and llHh, what ratio of...
23. ### Question about Krebs Cycle

Homework Statement What is the total yield of ATP in the Krebs cycle for each glucose molecule that enters glycolysis? Homework Equations The Attempt at a Solution Not sure if the correct answer is 2 ATP or 24 ATP due to 6 NADH (= 18 ATP) oxidative phosphorylation 2 FADH2 (= 4...

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25. ### Biology Homework Question

Homework Statement In general when comparing two molecules, Choose one answer. a. the more stable molecule can produce more ATP. b. the less stable molecule has less energy. c. the more stable molecule is larger. d. the less stable molecule is more likely to react. Homework...
26. ### Biology Homework Question

Homework Statement Consider the following events: 1) The protein has sugar added to become a glycoprotein. 2) The protein is in the plasma membrane with the sugar modification facing outside the cell. 3) A membrane protein is synthesized in the rough endoplasmic reticulum. 4)...
27. ### Chemistry Homework: Calculate Enthalpy Change

1. Calculate the approximate enthalpy change for the combustion of methane: CH4 + 2O2 ---> 2H20 + CO2 2. Homework Equations CH4 + 2O2 ---> 2H20 + CO2 enthalpy= D(reactants) - D(products) D= bond dissociation energies Bond Dissociation energy (KJ/MOL) C-C 350 C=C...
28. ### What is the kinetic energy in joules of a 950-lb motorcycle moving

1. Homework Statement 1. What is the kinetic energy in joules of a 950-lb motorcycle moving at 50 mph ? 2. If the speed of the motorcycle changes from 50 mph (with kintic energy K1) to 25 mph (with kinetic energy K2), what is the ratio of K1 to K2? 2. Homework Equations KE=1/2mv2...
29. ### Thermochemistry Homework Problem

Homework Statement 1. What is the kinetic energy in joules of a 950-lb motorcycle moving at 50 mph ? 2. If the speed of the motorcycle changes from 50 mph (with kintic energy K1) to 25 mph (with kinetic energy K2), what is the ratio of K1 to K2? Homework Equations 1. KE=1/2mv2...

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