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Cell Bio Practice Exam 2|32 Questions with Verified Answers RNA in cells differs from DNA in that ___. - CORRECT ANSWER it is single-stranded and can fold up into a variety of structures Transcription is similar to DNA replication in that ___. - CORRECT ANSWER nucleotide polymerization occurs only in the 5′-to-3′ direction. Which of the following statements is FALSE? (a) A new RNA molecule can begin to be synthesized from a gene before the previous RNA molecule's synthesis is compl...

Microbiology Exam 2 Practice Test 47 Questions with Verified Answers Salts and sugars work to preserve foods by creating a a. hypertonic environment b. hypotonic environment c. lower pH d. lower osmotic pressure e. depletion of nutrients - CORRECT ANSWER a. hypertonic environment The term facultative anaerobe refers to an organism that a. uses oxygen or grows without oxygen b. requires less oxygen than is present in air c. is killed by oxygen d. doesn't use oxygen but tolerat...

Cell Structure & Fn Exam #4 Practice 27 Questions with Verified Answers Mutations that alter sequences near the 5′ end of mRNA result in alterations near the corresponding protein's N-terminal end, whereas mutations that alter the 3′ sequences of mRNA result in alterations in the protein's C-terminal end. What do these findings imply? A. The N- and C-terminal ends of proteins are susceptible to alteration. B. The genetic code is a series of amino acids (the component parts of protei...

Bio 041 Final Exam Practice 40 Questions with Verified Answers Chemical reactions carried out by living systems depend on the ability of some organisms to capture and use atoms from nonliving sources in the environment. The specific subset of these reactions that use nutrients in food to build macromolecules can be described as _____________. a) metabolic. b) catabolic. c) anabolic. d) biosynthetic (question from practice exam 1) - CORRECT ANSWER catabolic In photosystem I, electrons ...

Biology Exam 3 Practice Test 40 Questions with Verified Answers In the 1940s and 1950s scientists were performing experiments to discover what molecule was the inheritance material. The basis of that work was Griffith's transformation experiments with the rough and smooth strains of Pneumococcus. Rough bacterial strains were transformed by A. treatment with radiation. B. infection with a virus. C. uptake of protein from the environment. D. uptake of DNA from the environment. - CORRECT...

BME 1020 Exam 1|65 Questions with Verified Answers Define the term "biomedical engineering" - CORRECT ANSWER The application of engineering techniques to the understanding of biological systems, practice of medicine, development of therapeutic technologies Distinguish Biomedical engineering from closely associated fields - CORRECT ANSWER Biomedical engineering is closely associated to disciplines such as physics, chemistry, material science, mechanical engineering, computer science, etc....

Bio1306 Exam 4 Practice 50 Questions with Verified Answers The final product produced from the "Central Dogma Theory" is ___ a) mRNA b) DNA c) absolutely nothing d) proteins - CORRECT ANSWER d) proteins How is DNA replicated? a) it's too small to tell b) semi-conservative replication c) dispersive replication d) conservative replication - CORRECT ANSWER b) semi-conservative replication DNA polymerase perform what function? a) synthesizes a growing strand of RNA b) synthesiz...

BIO Exam 4 Practice Test 174 Questions with Verified Answers The term polycistronic mRNA means: A.There is more than one mRNA strand produced during each round of transcription. B.There are multiple promotors to initiate transcription of this RNA. C.There are multiple operators for transcription of this RNA. D. There are multiple open reading frames in the mRNA produced. - CORRECT ANSWER D Please choose the true statement: A. During replication, the DNA leading strand is polymerized i...

Biochemistry Exam 3 Practice Tests 225 Questions with Verified Answers The complementary strand for the sequence 5' GCACTTCG 3' is - CORRECT ANSWER 5' CGAAGTGC 3' Polysomes...? (a) contain multiple mRNA's (b) contain multiple DNA's (c) contain multiple ribosomes (d) contain multiple RNA polymerases (e) a and c - CORRECT ANSWER (c) contain multiple ribosomes "Multiple ribosomes initiate on a SINGLE mRNA Polyribosomes or polysomes"- Ch 7 Proliferating cell nuclear ...

DNA and RNA Practice Quiz 23 Questions with Verified Answers All of the following are true about the structure of DNA except a. short strands of DNA are contained in chromosomes inside the nucleus of a cell b. every DNA nucleotide contains a sugar, a phosphate group, and a nitrogen base c. DNA consists of two strands of nucleotides joined by hydrogen bonds d. the long strands of nucleotides are twisted into a double helix - CORRECT ANSWER A Molecules of DNA are composed of long chains ...

A4M Practice Test 37 Questions with Verified Answers 1. Identify the true statement(s) concerning the role of mitochondria in longevity, aging, and disease. a. Decreased mitochondrial function results in increased oxidative damage, caused by free radical formation combined with a decrease in antioxidant enzyme system activity. b. Maternal transmission of mitochondrial genomes is a factor in differences in longevity between male and female organisms (Drosophila model) c. Alteration of the e...

BIOCHEM406 Practice Exam 3|103 Questions with Verified Answers Pick the best answer. A) The ratio of purine to pyrimidine 2 ́-deoxyribonucleotides in cells is always very close to 1. B) The ratio of (A+T) to (G+C) in cellular RNA polymers is always very close to 1. C) The ratio of (A+T) to (G+C) in cellular DNApolymersis always very close to 1. D) Answers B and C. E) Answers A and B and C. - CORRECT ANSWER A) The ratio of purine to pyrimidine 2 ́-deoxyribonucleotides in cells is alwa...

GCD Quiz 7/8 Practice 69 Questions with Verified Answers Which of the following may be used as a vector in a gene-cloning experiment? a.mRNA b.Plasmid c.Virus d.Both b and c - CORRECT ANSWER d The restriction enzymes used in gene-cloning experiments _______, which generates sticky ends that can _______. the DNA, enter bacterial cells the DNA, hydrogen bond with complementary sticky ends late DNA, enter bacterial cells late DNA, hydrogen bond with complementary sticky ends - CORRE...

Micro Practice Test 3-2|40 Questions with Verified Answers 1. A gene in a living organism is best defined as a. Three nucleotides that code for an amino acid. b. A sequence of nucleotides in DNA that codes for a functional product. c. A sequence of nucleotides in RNA that codes for a functional product. d. A transcribed unit of DNA. e. A transcribed unit of RNA. - CORRECT ANSWER b) a sequence of nucleotides in DNA that codes for a functional product 2. DNA is constructed of a. A sin...

Biology Chapter 18 Practice Test 44 Questions with Verified Answers In the case of E. coli, the bacterium may need to synthesize tryptophan, or its host, a human, may supply all the tryptophan it needs. Why do both bacteria and humans need tryptophan? A) It is an important enzyme in the glycolysis pathway. B) It is one of the 20 amino acids used by all organisms to synthesize proteins. C) It is an important constituent of cell walls in both humans and bacteria. D) Tryptophan induces the ...

UNT Biology 1710 Practice Exam 3|52 Questions with Verified Answers An excellent example of the genetic phenomenon known as continuous variation would be: a. flower color in plants. b. height in humans. c. human blood groups. d. epistasis. e. fur color in arctic animals - CORRECT ANSWER B) height in humans A human genetic trait passed from one generation to the next has an unusual inheritance pattern. The genotype and phenotype of the offspring depends only upon the genotype of the mo...

CSET 215/217 Xam Practice Test 147 Questions with Verified Answers Which is not true about a cell membrane? A. It is made from phospholipids B. Both plant and animal cells have a cell membrane C. The cell wall is the same as the cell membrane in plants D. It controls the passage of nutrients within a cell - CORRECT ANSWER C. The cell wall is the same as the cell membrane in plants Plant cells also have an outer cell wall to give it structure Microorganisms use all but the followin...

Human Genetics Practice Ch 10-14 Exam 154 Questions with Verified Answers The process of copying a gene's DNA sequence into a sequence of RNA is called _____. A) replication B) transcription C) translation D) PCR - CORRECT ANSWER B) transcription RNA contains which nitrogen-containing bases? A) adenine, thymine, guanine, cytosine, uracil B) adenine, thymine, guanine, cytosine C) thymine, guanine, cytosine, uracil D) adenine, guanine, cytosine, uracil - CORRECT ANSWER D) ad...

BISC 160 Exam 3 Practice Tests 86 Questions with Verified Answers After transcription, you will always have... - CORRECT ANSWER an RNA In prokaryotes, a chromosome is __________ and in eukaryotes, a chromosome is _________ - CORRECT ANSWER circular, wrapped around proteins DNA polymerase reads the template for the lagging strand from __________ and reads the template for the leading strand from ____________ - CORRECT ANSWER 3'-5', 3'-5' Which statement about okazaki fragments is ...

FTCE Middle Grades Science 5-9 Exam 406 Questions with Verified Answers Which of the properties listed below is a characteristic of a liquid but not of a gas? A. It has the ability to flow. B. It maintains its volume in an open container. C. Its molecules are constantly in motion. D. Its volume varies depending on temperature. - CORRECT ANSWER B A 0.100 m3 chamber is filled with oxygen gas at standard conditions (101 kPa at 273 k). Assuming ideal conditions and behavior, what will be t...