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38 Cards in this Set
- Front
- Back
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Q: What is term that describes the structure of a DNA molecule, in which two strands wind another to that of a twisted ladder |
A: Double Helix |
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Q: The process by which DNA is copied is called __________________. |
A: Replication |
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Q: Thymine (T)Adenine (A) pairs with ____? |
A: Thymine (T) |
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The images below show the same cell, before and after reaching equilibrium. Which statement best describes what happened as the volume of the cell increased? A. The number of solute particles inside the cell decreased. B. The number of solute particles outside the cell decreased. C. The number of solvent particles inside the cell decreased. D. The number of solvent particles outside the cell decreased. |
Correct Answer: D - The number of solvent particles outside the cell decreased. Explanation: As the solution reached equilibrium, the number of solvent particles decreased outside the cell and increased inside the cell. The volume of the cell increased as the solvent diffused through the cell membrane. This caused the cell to get bigger. |
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Heredity is controlled by: A: cells B: DNA C: evolution D: chromosomes |
chromosomes |
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Q. Chromosomes are located in the ________________ of a cell. |
: nucleus |
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Characteristics of an organism are called: a) traits b) genes c) chromosomes d) DNA |
a- traits |
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An organism with two like genes for a trait is said to be: a) heterozygous b) homozygous c) dominant d) recessive |
b. homozygous |
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Who was the first person to observe and describe cells? |
Robert Hooke |
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One of the key points in the cell theory states that cells come from other cells. True False |
True |
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In unicellular organisms, all of life's processes are carried out by the same cell. True False |
True |
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What is the function of the cell membrane? a- it protects the inside of the cell b-it supports the cell and gives it shape c- it controls what moves in and out of the cell d- all of the above e- none of the above |
All of the above knuckleheads! |
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The movement of molecules from crowded areas to less crowded areas is called: a- diffusion b- osmosis c- active transport d- passive transport |
DIFFUSION |
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Passive Transport does not require energy. a- true b- false |
True YUP YUP |
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The process plants use to capture energy from the sun to make food is called: a- energy transfer b- fermentation c- chemical transport d- photosynthesis |
PHOTO-synthesis |
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Cells of humans are able to reproduce and make new cells in a process called ____________ ______________. |
DNA replication |
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When a cell divides, each chromosome makes a copy that is: a- identical to the original b- slightly different from the original c- very different from the original d- a mutation of the original |
IDENTICAL to its original |
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The nucleus of a cell divides by the process of: a- osmosis b- diffusion c- respiration d- mitosis |
Mitosis |
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A gene combination in which a mixture of traits shows is called: a- purifying b- sex-linked traits c- hybridization d- codominance |
co-dominance |
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An organism with two like genes for a trait is said to be: a- heterozygous b- homozygous c- dominant d- recessive |
homozygous |
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A _____________ cell can contain either an X or a Y chromosome. |
Sperm |
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A fertilized egg that has two XX chromosomes will develop into a _______________. |
Female |
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Humans have: a- 46 pairs of chromosomes b-23 chromosomes c. 21 chromosomes d. 23 pairs of chromosomes |
23 pairs of chromosomes |
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Genes that are not expressed int he presence of a dominant gene are called: a. hybrid b. recessive c. allele d. heterozygous |
recessive |
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What is the result of a cross between dominant homozygous red flowers and recessive white homozygous flowers? List the resulting genotypes______________________________ and phenotypes ______________________________________________ |
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The region labeled B is called the: a) centromere b) centrioles c) sister chromatids d) spindle |
a) centromere |
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Unlike mitosis, meiosis results in the formation of: a- diploid cells b. haploid cells c. 2n daughter cells d. body cells |
B haploid cells |
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The first phase of mitosis is called: a. prophase b. anaphase c. metaphase d. interphase |
A. prophase |
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Typically the longest phase of mitosis is interphase. True False |
False - it is prophase |
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Gregor Mendel concluded that traits are: a. not inherited by offspring b. inherited though the passing of factors from parents to offspring. c. determined by dominant factors only. d. determined by recessive factors only. |
b. inherited though the passing of factors from parents to offspring. |
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In the Punnett square shown in the figure, which of the following are true: a. about half will be short b. all will be short c. all will be medium height d. all will be tall |
D. all will be tall |
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An organism that is heterozygous for a trait will generally show the recessive part. True False |
False, it will show the dominant trait |
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Organisms that have two identical alleles for a particular trait are called: a. hybrid b. homozygous c. heterozygous d. mutants |
b. homozygous |
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What is produced during transcription? a. RNA molecules b. DNA molecules c. protiens |
A. RNA molecules |
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Unlike DNA, RNA contains: a. adenine b. uracil c. phosphate groups d. thymine |
B URACIL |
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The replication of DNA results in 4 copies of the same gene. True False |
False 2 identical copies are made |
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During which phase of mitosis do the chromosomes line up along the middle of the dividing cell? a. prophase b. telophase c. metaphase d. anaphase |
c metaphase |
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Unlike mitosis, meiosis results int he formation of: a. diploid cells b. haploid cells c. 2n daughter cells d. body cells |
B haploid cells |
