Midterm Review: Question Preview (ID: 28897)

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Tall stems (T) are dominant to short stems. If two heterozygous tall stemmed plants cross, what are the possible genotypes of their offspring?
a) Tt only b) Tall stems and short stems c) TT, Tt, and tt d) TT and Tt
Which cell reproduces more quickly?
a) prokaryotic cell b) eukaryotic cell c) animal cell d) plant cell
If a cell is damaged during interphase and it does not repair itself or go through apoptosis, then the cell will grow uncontrollably. This uncontrollable growth of cells is called ______________
a) cell death b) G2 c) mitosis d) cancer
Under a microscope a cell is observed to have mitochondria, ribosome, nucleus, and a cell wall. What type of cell is observed?
a) a prokaryotic cell that is in bacteria b) a eukaryotic cell that is in an animal c) a eukaryotic cell that is in a plant d) a eukaryotic cell in either a plant or animal
Which marcomolecules are organic?
a) carbohydrates and lipids b) nucleic acid c) carbohydrates, protein, and lipids d) carbohydrates, proteins, lipids, and nucleic acids
In biology what does organic mean?
a) molecules that contain carbon b) substances that are not made of chemicals c) substances that are found in the natural world d) water molecules
The cell membrane is made up of mostly which macromolecule?
a) lipid b) carbohydrate c) protein d) nucleic acid
How many cells are produced at the end of meiosis?
a) 2 genetically identical cells b) 2 genetically different cells c) 4 genetically identical cells d) 4 genetically different cells
What is the first phase of mitosis?
a) interphase b) metaphase c) prophase d) cytokinesis
What is the correct order of phases of the cell cycle (for a somatic cell)?
a) G1, S, and G2 b) interphase, prophase, metaphase, anaphase, telophase, and cytokinesis c) interphase, meiosis 1, meiosis 2, and cytokinesis d) prophase, metaphase, anaphase, and telophase
If there are 78 chromosomes in a dog's bone cell, then how many chromosomes will it have in its gamete?
a) 24 b) 39 c) 78 d) 156
Crossing over occurs in the phase ______________ of ____________.
a) G1, interphase b) anaphase, mitosis c) prophase 1, meiosis d) metaphase 2, mitosis
When a piece of liver is dropped into hydrogen peroxide, bubbles are released as the hydrogen peroxide (H2O2) decomposes into water (H2O) and oxygen (O2). However, if the liver is cooked first, the reaction fails to occur. The reason for this is
a) heating kills the germs that cause the bubbling b) reactions take place faster at lower temperatures c) heating removes the water and oxygen from the liver d) heating damages the enzyme's active site in liver that breaks down hydrogen peroxide
When a piece of liver is dropped into hydrogen peroxide, bubbles are released from the liver as the hydrogen peroxide (H2O2) decomposes into water (H2O) and oxygen (O2). This rapid change in reaction rate suggests
a) that liver contains lots of germs b) the liver contains an enzyme that breaks down hydrogen peroxide c) that liver is a substrate for hydrogen peroxide d) that hydrogen peroxide is a powerful enzyme
Cells must produce many different enzymes because
a) enzymes are quickly used up b) most cellular reactions require a specific, unique enzyme c) they have to have some way to use up the protein that they consume d) enzymes are not very effective at speeding up reactions
How do enzymes speed up chemical reactions?
a) lowering the activation energy b) raising the temperature of the environment c) creating more substrates d) increasing the pH
Round seeds (R) are dominant to wrinkled seeds. What would the parents' genotypes be if they produce offspring that are 50% round seed and 50% wrinkled seed?
a) Rr and rr b) Rr and Rr c) Both RR d) RR and rr
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