Lord help me Flashcards
1
Q
Give two characteristics of life.
A
Growth&Development, reproduction, order, irritability, regulation
2
Q
A student wrote “The solution turned bluish-green in her notebook. What type of data is that?
A
qualitative data
3
Q
T or F. A community is a group of interacting organisms of one species.
A
False
4
Q
The study of fungi is commonly referred to as this.
A
Mycology
5
Q
What is a something that has mass and takes up space called?
A
Matter
6
Q
What is the atomic number of oxygen (8 electrons, 8 protons, 8 neutrons)?
A
8
7
Q
Atom X has an atomic number of 15 and is a cation (magnitude of 1). How many electrons does it have?
A
14
8
Q
Atom X also has an atomic weight of 32. How many neutrons does it have (use the information from question 7)?
A
17
9
Q
This subatomic particle is responsible for the chemical properties of an atom.
A
Electron
10
Q
What is a positively charged ion called?
A
Cation
11
Q
What are the outermost electrons that are involved with bond formation called?
A
Valence
12
Q
What type of bond is seen when electrons are shared between atoms?
A
Covalent
13
Q
The tendency of water molecules to stick together is an example of what property of water?
A
cohesion
14
Q
What are the dissolved particles in a solution called?
A
solute
15
Q
What term is used to describe a substance that will not dissolve in water?
A
hydrophobic
16
Q
These substances resist changes in pH.
A
buffers
17
Q
What is the functional group COOH called?
A
Carboxyl
17
Q
T or F. pH is a direct measurement of the OH concentration in a solution.
A
false
18
Q
What are the repeating units called that will join to form macromolecules?
A
Monomers
19
Q
This is the name of the reaction that joins smaller molecules to form larger ones.
A
dehydration synthesis
20
Q
This is the general term given to a fatty acid that has some C=C double bonds.
A
unsaturated
20
Q
This type of lipid aids in protection in plants and animals.
A
waxes
21
Q
What is the name of the covalent bond that links carbohydrate monomers together?
A
Glyosidic linkage
21
Q
What is the name of the bond that links amino acids together?
A
peptide
22
What are the building blocks of carbohydrates called?
monosaccharides
22
What are the repeating units called that will join to form macromolecules?
monomers
23
This is the name of the reaction that joins smaller molecules to form larger ones.
dehydration synthesis
24
What is a sugar called that has five carbons?
pentose
25
Starch is a polymer of what molecule?
glucose
26
T or F. Only plant cells have a vacuole.
false
27
Name one structure that is found in animal cells but not in plant cells.
centrioles
27
Name one difference between prokaryotic and eukaryotic cells.
size, nucleus, membrane organelles (but tell me which one has which)
28
A muscle cell needs to store and release calcium. What organelle would be responsible for this?
smooth ER
29
T or F. All cells have a cell membrane.
true
30
What is the function of the nucleolus?
to produce ribosomal subunits
31
There is 15% sucrose outside a cell and 5% sucrose inside. What is the inside of the cell with respect to the outside?
Hypotonic
32
What is the function of the Golgi apparatus?
package and modify proteins
33
A cell is making a membrane protein. What organelle would be responsible for this?
rough ER (because the protein is going to the membrane)
34
This organelle is the site of cellular respiration.
mitochondria
35
In the above situation, in which direction will the water move?
water will leave the cell
36
What term would be used to describe this situation if it were a plant cell?
plasmolysis
37
All of the following are functions of membrane proteins EXCEPT:
A. cell-cell recognition
B. protein synthesis
C. signal transduction
D. transport
B. protein synthesis
38
In receptor mediated endocytosis, what is the name of the protein that is found coating the membrane?
clatharin
39
T or F. In an isotonic environment, water can still pass across a membrane.
true
40
A cell containing .5% Ca is surrounded by solution that has .3% Ca. How could the cell obtain more Ca?
active transport
41
The engulfing of fluids by a cell is called this (be specific).
pinocytosis
42
The kinds of molecules that pass through a cell membrane most easily are:
A. large and hydrophobic
B. small and hydrophobic
C. large polar molecule
D. ionic
B. small and hydrophobic
43
What function does cholesterol serve in the cell membrane during colder temperatures?
they serve as spacers during colder temps – prevents cell membrane from solidifying
44
The mathematical expression for the change in free energy of a system is ΔG =ΔH - TΔS. Which of the following is (are) correct?
A) ΔS is the change in enthalpy, a measure of randomness.
B) ΔH is the change in entropy, the energy available to do work.
C) ΔG is the change in free energy.
D) T is the temperature in degrees Celsius.
C) ΔG is the change in free energy.
45
This is the substance that the enzyme acts on.
substrate
46
T or F. In an exergonic reaction, the energy of the products is greater than the reactants.
false
47
What term describes what happens when enzymes are exposed to unfavorable temperatures or pH?
denatured
48
Briefly, how do enzymes work?
they lower the energy of activation
49
This is the energy that actually does work.
kinetic
50
T or F. An endergonic reaction requires energy and is usually seen in anabolic
reactions.
true
51
Which of the following types of reactions would decrease the entropy within a cell?
A) anabolic reactions
B) hydrolysis
C) digestion
D) catabolic reactions
A) anabolic reactions
52
What is the name of the region on the enzyme where the substrate binds?
active site
53
Name one difference between DNA and RNA.
T v. U
54
What is the strand called that has Okazaki fragments?
lagging
54
What type of base is cytosine?
pyrimidine
54
What enzyme is responsible for separating the two strands of DNA during replication?
Helicase
55
What enzyme is responsible for adding nucleotides to the growing strand of DNA during replication?
DNA polymerase
56
What type of base is thymine?
Pyrimidines
57
What type of base is adenine?
purine
57
What type of base is guanine?
purine
58
What type of base is uracil?
nitrogen
59
What keeps the two strands of DNA from coming back together after they have been separated?
single stranded binding proteins
60
People with Xeroderma pigmentosum lack repair enzymes that proofread DNA and repair it this way.
nucleotide excision repair
61
Name the enzyme responsible for joining Okazaki fragments together.
DNA ligase
62
Write the reaction for photosynthesis
CO2 + H2O + energy --------> O2 + C6H12O6
63
T or F. If something is reduced, it has lost electrons.
false
64
Which has the most amount of energy, longer or shorter wavelengths?
shorter
65
What is the specialized tissue inside of a leaf called where there is a high concentration of chloroplasts?
mesophyll
66
Carbon dioxide enters the leaf through specialized pores called this.
stomata
67
What are the two products produced in the light reactions that are used in the Calvin cycle?
ATP & NADPH
68
What photosystem is involved with cyclic electron flow?
1
69
What photosystem produces NADPH?
1
70
What is the name of the reaction center seen in Photosystem I?
P700
71
What enzyme is responsible for fixing CO2 to RuBP?
rubisco
72
Write the reaction for cellular respiration (it does not have to be balanced).
C6H12O6 + O2 ---------> CO2 + H2O + energy
73
What are the folds along the inner membrane of the mitochondria called?
cristae
74
Where does glycolysis occur?
cytoplasm
75
How many NADH are produced in glycolysis?
2
76
Where does the Kreb’s cycle occur?
mitochondrial matrix
77
What term is used to describe the way the ATP are produced during the Kreb’s cycle?
substrate level phosphorylation
78
How many FADH2 molecules are produced from one molecule of glucose?
2 (it goes through the Kreb’s cycle twice per glucose molecule)
79
How many NADH molecules are produced from one turn of the Kreb’s cycle?
3
80
How many ATP are produced from every NADH molecule?
3
81
What is the constricted area common to both sister chromatids called?
centromere
82
In what stage of mitosis do the sister chromatids separate?
Anaphase
83
What is the name of the protein that keeps the sister chromatids together?
Cohesin
84
T or F. Mitosis may occur without cytokinesis.
true
85
Cells that are no longer actively dividing are found in what part of the cell cycle?
G0
86
You are viewing a cell and see that the formation of the cell plate is beginning across the middle of the cell and nuclei are re-forming at opposite ends of the cell. What kind of cell is this and what stage is it in?
plant cell – telophase/cyokinesis
86
In function, the animal cell structure that is analogous to a plant cell’s cell plate is the _______.
cleavage furrow
87
If there are 20 centromeres in a cell, how many chromosomes are there?
20
88
What term is used to describe the way that prokaryotic organisms divide?
binary fission
89
In animals, meiosis results in gametes, and fertilization results in _____
zygotes
90
In what stage of mitosis does the nuclear membrane start to break down?
prophase
91
If the liver cells of an animal have 24 chromosomes, its sperm cells would have how many chromosomes?
12
92
Crossing over occurs in what stage of meiosis?
prophase 1
92
What is the process called where tetrads will form?
synapsis
92
What name is given to the process that restores the diploid number of chromosomes?
fertilization
93
What is the point called where the tetrads are touching?
chiasmata
93
Widow’s peak is a dominant trait over having no widow’s peak. What phenotype
would a heterozygous individual display?
widows peak
93
During meiosis, tetrads align along the metaphase plate during _______.
metaphase 1
93
Besides crossing over, name one other thing that is responsible for the genetic variation seen in meiosis.
random fertilization or independent assortment
94
The DNA content of a diploid cell in the G1 phase of the cell cycle is measured. If the DNA content is x, then the DNA content of the same cell at metaphase of meiosis I would be _____.
2x
95
if we continued to follow the cell lineage from the above question, then the DNA content at metaphase of meiosis II would be _____
x
96
A woman, who is blood type B has a child who is type O. What is this woman’s
genotype?
IBi
97
Snapdragons are a type of flower that exhibit incomplete dominance. When red flowers are crossed with white flowers, the next generation all have pink flowers. What term is used to describe the genotype of the pink flowers?
heterozygous
98
What term is used to describe when two or more genes alter the expression of
another gene?
epistasis
99
Tall stems are dominant to short stems and inflated pods are dominant to
constricted pods. List all the possible gametes that a true breeding inflated pod,
tall stemmed plant could produce.
TI (four of them)
100
In pea plants, purple flower color is dominant to white flower color. You have a
purple flower and want to determine its genotype. Name the type of cross you
would perform that would accomplish this.
testcross
101
Genes A, B and C all influence the same trait. What type of inheritance is this?
polygenic inheritance
102
You are examining the inheritance of two traits but find that they behave as if only one trait is being passed on. Briefly, what could explain these findings?
they are linked
103
What term is used to described when one gene alters the expression of 2 or more
traits?
pleiotropy
104
Name the type of chromosomal mutation where a lost segment of one chromosome reattaches itself to a nonhomologous chromosome.
translocation
105
Again, purple flower color is dominant to white flower color. If a heterozygous plant is crossed with a white flowered plant, what is the phenotypic ratio of the resulting offspring?
2:2 or 1:1
106
What is the term used to describe when the members of a pair of homologous chromosomes do not move apart in Meiosis I?
nondisjunction
107
Out of the two ways to do a karyotype on a fetus, which one is the quickest?
CVS
108
Name one type of sex chromosomal disorder where there is an uneven number of sex chromosomes. Include the genotype of the disorder.
one example: Turner’s Syndrome - XO
109
What is trisomy 18 called?
Edward’s syndrome
110
T or F. The incidence of Down syndrome occurring increases with the age of
the mother.
true
111
Give one example of an autosomal recessive disorder.
albinism
cystic fibrosis
sickle-cell disease
112
Give one example of an autosomal dominant disorder.
alzheimer's
achondroplasia
polydactyly
113
T or F. Some mutations are actually beneficial.
true
114
What is the inactivated X chromosome in females called?
Barr body
115
A particular triplet of bases in the template strand of DNA is 5’ AGT 3’. The corresponding codon for the mRNA transcribed is_________.
3’ UCA 5’
116
A particular triplet of bases in the coding sequence of DNA is AAA. The anticodon on the tRNA that binds the mRNA codon is ________.
AAA
117
During elongation, which site in the ribosome represents the location where a codon is being read?
A site
118
T or F. RNA is synthesized during a process called transcription.
true
119
What type of mutation introduces a premature stop codon into the mRNA?
nonsense
120
What type of mutation covered would have the least impact?
silent
121
What are the coding segments of the mRNA transcript called?
exons
122
What part of a gene marks the end and causes transcription to stop?
terminator
123
T or F. One of the functions of tRNA is to transfer nucleotides to rRNA.
false
124
What modification happens to the mRNA transcript at the 3’ end?
poly A tail
