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Test your knowledge of key concepts from Chapter 5 to Chapter 6

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OKAFOR, PETER

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practice testVersion en ligne Test your knowledge of key concepts from Chapter 5 to Chapter 6 par OKAFOR, PETER 1 The structure of proteins thats determined by interactions between R groups? Choose one or more answers a primary structure b secondary structure c tertiary structure d quaternary structure 2 Which of the following is a secondary structure of proteins Choose one or more answers a Alpha helix b nucleic acids c tertiary d quaternary 3 A strong covalent bond formed between two S atoms of the thiol R groups. a hydrophobic interaction b disulfide bridge c ester bond d glycosidic linkage 4 Which of the following is a function of the phosphate group in nucleic acids? a to store energy b make nucleic acids water soluble c link nucleotides together d All of the above 5 What is the name of the bond that connects two nucleic acid chains in DNA? a phosphodiester bond b covalent bonds c hydrogen bonds d hydrophobic interactions 6 (True or false)? Phosphodiester bonds stabilize RNA while hydrogen bonds stabilize DNA. a False. b True. 7 Which of the following does not apply to purines, a They are nitrogenous bases b they are double ring carbon structures c adenine and thymine d 6 ring carbon fused to 5 ring carbon ring 8 What is a pyrimidine? a A six ringed carbon nitrogenous base b A five ringed carbon pentose sugar c A type of amino acid d two bonded nitrogenous bases 9 which of the following is considered a purine? a Adenine b uracil c thymine d cytosine 10 What is the function of an enzymatic protein? Choose one or more answers a to increase the activation energy of a reaction b to catalyze reactions c reduce the likely hood of a reaction d all of the above 11 How many amino acids are there? Choose one or more answers a 10 b 30 c 26 d 20 12 Which of the following functional groups are present in amino acids? Choose one or more answers a carboxyl b methyl c amine d sulfhydryl 13 At which level of protein structure does the mutation that causes sickle cell disease occur? Choose one or more answers a tertiary b secondary c primary d quaternary 14 True or False: Magnification is the ratio of an object’s image size to its real size. a False b True 15 True or False: Resolution is the visible difference between parts of the sample. a True b False 16 Contrast is the minimum distance between two points, or the clarity of the image a True b False 17 What is the difference between a scanning electron microscope and a Transmission electron microscope? Written answer 18 What is cell fractionation a The breaking down of cells to recombine them with other cells. b when a cell undergoes apoptosis c the breaking down of cells to examine the structure and function of organelles d when a cell undergoes cell division 19 True or false: All cells have a nucleus. a True. All cells must have a nucleus to be considered a cell b False. Prokaryotes are cells that do not possess a nucleus. 20 The smallest unit of life a atoms b viruses c cells d fungi 21 Where do all cells descend from? Select all that apply. Choose one or more answers a dirt b sperm c A common ancestor d pre-existing cells 22 Which of the following is a unique property of mitochondria a It has it's own DNA b It has its own ribosomes c It has a double membrane d All of the above 23 which of the following is present in a plant cell but lacking in an animal cell? a mitochondria b cell wall c nucleus d ribosomes 24 Which of the following is true about the cell membrane? Choose one or more answers a It is a single layer membrane b the heads of the membrane are hydrophilic c It is semipermeable d its composed of phospholipids 25 Which of the 5 carbons in the pentose sugar of nucleotides will bond with the phosphate group to form the phosphodiester bond? Choose one or more answers a 3' b 2' c 5' d 1' Feedback 17 If whatever you typed followed the line of reasoning above, then you got the answer correct.

practice test

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Créé par

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par OKAFOR, PETER

The structure of proteins thats determined by interactions between R groups?

Which of the following is a secondary structure of proteins

A strong covalent bond formed between two S atoms of the thiol R groups.

Which of the following is a function of the phosphate group in nucleic acids?

What is the name of the bond that connects two nucleic acid chains in DNA?

(True or false)? Phosphodiester bonds stabilize RNA while hydrogen bonds stabilize DNA.

Which of the following does not apply to purines,

What is a pyrimidine?

which of the following is considered a purine?

What is the function of an enzymatic protein?

How many amino acids are there?

Which of the following functional groups are present in amino acids?

At which level of protein structure does the mutation that causes sickle cell disease occur?

True or False: Magnification is the ratio of an object’s image size to its real size.

True or False: Resolution is the visible difference between parts of the sample.

Contrast is the minimum distance between two points, or the clarity of the image

What is the difference between a scanning electron microscope and a Transmission electron microscope?

What is cell fractionation

True or false: All cells have a nucleus.

The smallest unit of life

Where do all cells descend from? Select all that apply.

Which of the following is a unique property of mitochondria

which of the following is present in a plant cell but lacking in an animal cell?

Which of the following is true about the cell membrane?

Which of the 5 carbons in the pentose sugar of nucleotides will bond with the phosphate group to form the phosphodiester bond?