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Life Science Semester 1 Exam Flashcards | StudBud
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Life Science Semester 1 Exam
Life Science Semester 1 Exam
36 terms
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1
____ is a characteristic that is passed from parent to offspring.
pedigree
heredity
trait
genetics
2
Salt (NaCl) is a type of chemical ___
compound
atom
solution
mixture
3
____ is any permanent change in a gene or a chromosome
fission
mutation
replication
reproduction
4
Which of the following cells undergo meiosis?
unicellular organisms
sperm cells
all of the above
liver cells
5
Structures made up of different types of tissues that work together are called__
organisms
organ system
organelles
organs
6
A baby girl is born. What sex chromosome (s) did she receive from her father?
a Y chromosome
an X and a Y chromosome
two X chromosomes
an X chromosome
7
The movement of large molecules through the cell membrane out of the cell is called
osmosis
endocytosis
homeostasis
exocytosis
8
The genetic make-up of a particular trait in an individual is its
heredity
genotype
heterozygosity
phenotype
9
Objects that are too small to be seen with other microscopes can be observed with a(n)
simple microscope
electron microscope
stereomicroscope
compound light microscope
10
the chromosome number in cells after mitosis is __ the parent cell number
twice
half
four times
the same as
11
chromosomes are doubled during
anaphase
telophase
interphase
metaphase
12
The base sequence of DNA is ATA GCA TCC. The sequence of RNA transcribed from this strand is
UAU CGU AGG
CCU ACG AUA
CCT ACG ATA
ATA GCA TCC
13
All matter is made up of
atoms
mass
carbon
water
14
In a(n) ____, substances mix evenly with other substances
suspension
organic compound
solution
inorganic compound
15
Most sex-linked disorders are carried on the X chromosome
True
False
16
what is an example of adaptation
a fossil
camoflage
embryo
gradualism
17
what category of organism can mate and produce fetrtile offspring?
genus
family
class
species
18
A scientific prediction that can be tested is called a(n)
theory
conclusion
law
hypothesis
19
Which base does not belong in RNA?
uracil
adenine
guanine
thymine
20
Down's Syndrome is an example of a ___
sex-linked disorder
chromosome disorder
multiple allele disorder
recessive genetic disorder
21
Cells in a many-celled organism all
have similar shapes
perform similar functions
are about the same size
work together to keep the organism alive
22
A solution made from weakened virus particles
lysosome
gene therapy
vaccine
golgi bodies
23
Each human skin cell has ____ pairs of chromosomes
46
23
13
18
24
_ are made up of only one kind of atoms
elements
molecules
atoms
compounds
25
rRNA represents
messenger RNA
reaction RNA
ribosomal RNA
transfer RNA
26
When a red allele and a white allele combine in codominance, what happens?
you get a white offspring
you get a pink offspring
you get red and white speckled offspring
you get red offspring
27
The theory that living things produce living things is called
photosynthesis
spontaneous generation
biogenesis
homeostasis
28
Organic compounds contain _____ and _____
carbon, nitrogen
carbon, water
carbon, hydrogen
hydrogen, calcium
29
A statement about how things work in nature that seems to be consistantly true is called a(n)
law
theory
organism
hypothesis
30
The movement of molecules from an area where there are many to an area where there are few is called
equilibrium
active transport
osmosis
diffusion
31
Sides of the DNA ladder are
phosphate and base
sugar and phosphate
base and sugar
32
RNA contains which sugar
glucose
deoxyribose
fructose
ribose
33
Eye color is a trait inherited through
multiple alleles
recessive genes
incomplete dominance
polygenic inheritance
34
which is not a part of cell theory?
New cells come from old cells through cell division
All organisms are made up of one or more cells
The cell is the basic unit of all organisms
Cells are made up of organelles that have special functions to the cell
35
In order for a trait to appear in an organism, it MUST have at least one dominant allele
False
True
36
The total of all chemical reactions in an organism is
endocytosis
cellular respiration
metabolism
photosynthesis
