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WorksheetsBiology Final Exam Practice
Total questions: 72
Worksheet time: 54mins
The movement of particles down a concentration gradient from high to low is called diffusion.
True
False
tRNA brings in the correct anti codon and leaves behind the corresponding ______________________________.
DNA
Gene
Amino Acid
DNA is a (a) helix model while RNA is single stranded.
Both cytosine and thymine are Purines.
True
False
The central dogma of Biology is:
Replication, Transcription and Translation are the three main processes used by all cells to maintain their genetic information and to convert the information, encoded in DNA, into gene products- either RNA or proteins.
All cells come from other cells
Darwin's theory of evolution
The two Pyrimidines in DNA are __________________________________________________.
cytosine and thymine
cytosine and uracil
adenine and guanine
mRNA leaves the nucleus of the cell and head into the cytoplasm where it is read by the ____________________________.
mitochondria
telomeres
ribosomes
Uncontrolled cell division is also called __________________________.
trimosy
cancer
alzheimers
DNA replication occurs during which stage of the cell cycle?
G-0
S-Phase
G-1
Which stage of mitosis is represented by the image?
anaphase
telophase
interphase
Is mRNA synthesized during transcription or translation?
translation
transcription
The plasma membrane of the cell contains channels that help move materials from one side to the other. What are these channels made of?
Carbonhydrates
lipids
protiens
During this stage of the cell cycle, centrioles and spindle fibers appear in the cytoplasm, the nucleus disapears and DNA condenses into chromosomes.
interphase
phrophase
telophase
Energy is released for a cell to use when ATP breaks off a _____________________ group.
nitrogen
energy
phrophase
The building blocks of nucleic acids are _________________________________.
nucleotides
amino acids
lipids
Which term refers to the actual splitting of the cell during cell division?
interphase
cytokenesis
telophase
During the G-0 stage a cell is ____________________________.
continuously growing
at rest
dividing
G-1, S and G-2 are all sub phases of which part of the cell cycle?
phrophase
metaphase
interphase
Please provide the complementary mRNA pairings for the following DNA sequence:
CAGGAATTGCTCG
(a)
Which molecules form the backbone of the DNA molecule?
nitrogen and sugar
sugar and phosphate
nitrogen and hydrogen
Please provide the complementary DNA base pairings for the following strand of DNA
ATGGTAGCTAA
(a)
A nucleotide consists of phosphate, sugar and an amino acid.
True
False
During this phase of the cell cycle the chromosomes line up in the middle of the cell and prepare to be pulled apart.
metaphase
anaphase
prophase
The enzyme which adds nucleotide subunits to the strand of new mRNA and spell checks for code errors is known as ___________________________.
polymerase
telomeres
centrioles
What type of bond holds the nitrogen bases together in the middle of the DNA strand?
covalent bonds
polar covalent
hydrogen bonds
The DNA in eukaryotic cells can be found in the nucleus.
True
False
Which phase is the longest part of the cell cycle?
Prophase
Cytokensis
interphase
What are the reasons that cells divide?
to repair or replace damaged cells
to avoid becoming to large
to reproduce
all of the above
What are the reasons that cells divide?
deoxyribose
glucose
ribose
Small round balls of protein around which DNA coils itself for organization are called ____________________________.
tRNA
purines
histones
If a cell contains a nucleus then it must be a ____________.
electrons
eukaryotic cell
prokaryotic cell
Which best describes the structure of the cell membrane?
carbohydrates sandwiched between two layers of phospholipids
protein channels and cholesterol embedded in a double layer of phospholipids.
a solid, impermeable wall.
Which of the following equations best represents photosynthesis?
C + O₂ + H₂O > CO₂ + HOH
6CO₂ + 6H₂O + sunlight > C₆H₁₂O₆ + O₂
C₆H₁₂O₆ + O₂ > 6CO₂+H₂O
Which of the following is a function of the plasma membrane?
It breaks down lipids, carbohydrates and proteins from food
It regulates which materials can enter and leave the cell.
It stores water, salt, proteins and carbohydrates.
Which organelle is the storehouse for most of a cell's genetic information?
mitochondria
chloroplast
nucleus
Proteins are secreted from the cell when a vessicle containing the proteins fuses with the plasma membrane and dumps its contents OUTSIDE the cell. This process is called _________________________________
endocytosis
exocytosis
osmosis
Which organelles are unique to plant cells?
chloroplasts
ribosomes
vacuoles
Metaphase
Prophase
Anaphase
Because the phospholipid molecules and some proteins are free to move, the plasma membrane is said to be a _______________________________.
fluid mosaic model.
solid wall
fatty acid
Each of the following is a main idea of the cell theory except ________.
all organisms are composed of cells
the cell is the basic unit of organization of organisms
all cells are similar in structure and function
The smallest basic unit of matter is the ___________.
molecule
atom
cell
The plasma membrane contains channels that help move materials from one side to the other. What are these channels made of?
carbohydrates
protiens
creatine :)
The atomic mass of an element is always equal to it's number of protons.
True
False
If a cell contains a nucleus, it must be a(n) ________.
plant cell
eukaryotic cell
animal cell
In a water molecule, the oxygen atom has a slightly _____________ charge.
positive
ionic
negative
Humans are called autotrophic because our cells make their own food.
True
False
We use two different dish soaps to clean the same dirty plate and then observe how clean the plate is. The two different dish soaps are our:
dependent variables
independent variables
constant
Diffusion is the net movement of molecules from
an area of high concentration to an area of low concentration.
an area of low concentration to an area of high concentration.
an area of equilibrium to higher concentration.
What is the name of the process that breaks glucose down to be used in cellular respiration?
fermentation
electron transfer
glycolysis
Which phrase best describes the function of the ATP molecule?
stores energy
carries energy
absorbs energy
The process by which autotrophs use energy from sunlight to build carbohydrates is called _______________________________.
cellular respiration
ATP
photosynthesis
Animals cells do not have a cell wall.
True
False
Which of the following inventions led to the discovery of cells?
Calculator
Microscope
electricity
If a substance has a high H ion concentration then we say it is a base.
True
False
Which of the following is formed when an atom gains or loses electrons?
element
compound
ion
Who used a compound microscope to see chambers within cork and named them "cells"?
Anton van Leeuwenhoek
Robert Hooke
Joe Biden
Cells store energy when _________.
the third phosphate group breaks off from an ATP molecule
they break down sucrose to glucose and fructose
a third phosphate group is bonded to an ATP molecule
Which of the following organisms do not have cell walls?
fungi
animals
bacteria
What are the basic building blocks of proteins?
amino acids
fatty acids
nucleic acids
Energy is released from ATP when the bond is broken between ____________.
two phosphate groups
adenine and ribose
ribose and a phosphate group
Atoms in molecules share pairs of electrons when they form ___________.
covalent bonds
ionic bonds
hydrogen bonds
Which of these cells would you expect to have the largest number of mitochondria?
blood cells
muscle cells
skin cells
Normal atoms have a positive charge.
True
False
The smallest particle of a substance that still retains the properties of that substance is an _____________.
atom
molecule
compound
In which type of mixture are the parts unevenly mixed?
homogeneous
heterogeneous
compound
Electrons have very little mass.
True
False
Covalent bonds form when
two molecules of water are joined together
a molecule of water becomes an ion
two hydrogen atoms share electrons with one oxygen atom.
The _________________ of an atom are found outside of the nucleus in orbitals or valence shells.
Electron
True
False
A substance that is only composed of one type of atom is called a __________________________.
compound
molecule
element
Acidic solutions have a pH that is _____________________.
less than 7
more than 7
exactly 7
The nucleus of an atom is composed of
protons and electrons
protons and neutrons
electrons only
A substance with a pH of 6 is called an ________________.
base
acid
neutral substance
