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61 Cards in this Set

  • Front
  • Back

Cell cycle

Sequence of events that takes place in between cell divisions

Mutation

Any mistake from the correct DNA sequence

Daughter cell

One cell splits into two new ______

G1

Primary growth phase in which the cell doubles in size

S

Synthesis phase in which the DNA is copied

G2

Secondary growth phase in which the cell makes final preparations for cell division

Interphase

The cell spends most of its time in this, has 3 separate phases

Semiconservative replication

Where two copies are made so that each of the new DNA molecules contain one strand from the original DNA

Mitosis

Division of the nuclear material

Spindle apparatus

Used to move the chromosomes astounds the cell

Prophase

-DNA begins to change from its loose, uncoiled form (chromatin) into chromosomes


-the nuclear envelope is disassembled


-the spindle apparatus forms

Metaphase

The cell is considered to be in_____when the chromosomes are all lined up along a plane at the center of the cell

Equator

Center of the cell where chromosomes line up during metaphase

Anaphase

Occurs when the Centro centromere regions of the chromosomes divide and chromatids are pulled toward opposite poles of the cell

Telophase

Once the two sets of DNA are separated at opposite poles, the cell enters ___


-chromosomes begin to uncoil into chromatin


-nuclear envelopes begin to reform around each set of DNA


-the spindle apparatus is disassembled

Chromosomes

DNA that is in tightly coiled structures

Chromatin

Loose and uncoiled DNA

Histones

Proteins that strands of DNA wrap around to prevent tangling

Chromatids/ centromere

A chromosome consists of two identical halves called _____ joined to each other at a region called a ________

Homologous chromosomes

____ are the same size and shape and contain DNA that code for the same proteins

Deoxyribonucleic acid DNA

The molecule that actually contains the genetic information.

Nucleotide

DNA is made of monomers called _____. These structures contain three basic parts


-sugar (deoxyribose)


-phosphate group


-nitrogen base


Deoxyribose

Sugar found in the nucleotide structure of DNA

Codons

Groups of three nitrogen bases

Anticodon

Group of Three nitrogen bases on tRNA that are complementary to a codon on mRNA

Initiation complex

What is formed when a mRNA molecule, a tRNA molecule, and a ribosome fit together. This allows translation to begin

Genetic code

Correlation between the base sequence in DNA and the amino acid sequence for a particular protein

Replication

The process by which DNA copies itself

DNA helicase

"Unzips" the double helix by breaking hydrogen bonds between complementary nitrogen bases

DNA polymerase

Adds new nucleotides with complementary nitrogen bases to each of the strands

Polygenic

Traits are controlled by more than one pair of genes; such Teairra have a wide variety of phenotypes that exhibit continuous variation from one form to another

Universal recipient

Can receive from any other blood type. AB

Universal donor

O. It can be transfused into any other blood type

Phenotype

Physical expression of a trait

Complete dominance

Occurs when one allele completely masks the effects of another allele when they ate combined in the heterozygous genotype

Incomplete dominance

Occurs when the phenotype of the heterozygote exhibits a blending of the two contrasting traits

Codominance

Occurs when the phenotype of the heterozygote exhibits both contrasting traits equally

Multiple allele traits

_____ are controlled by a single pair of genes in each individual, but there are more than two contrasting forms of the genre in the population

Gene

A segment of DNA that code for a specific polypeptide

Alleles

Alternate forms of a gene

Dominant

The expressed allele is called _____

Recessive

The allele that is hidden is labeled ____

Homozygous

A genotype that contains two identical alleles.


(TT) _____dominant


(tt) ______ recessive

Heterozygous

A genotype with two different alleles


(Tt)

Genotypes

The genetic makeup of an organism

G0

The phase where cells have said to have excited the cell cycle.


Some cells grow to maturity but do not immediately divide

Cleavage furrow

Forms when the cell membrane is "pinched" in along the plane of the equator

Transcription

The process in which molecules of RNA ate made using the information in DNA

Translation

The process of using RNA to actually assemble proteins

Central dogma

States that hermetic information flows from DNA to RNA to proteins

RNA polymerase

The enzyme that controls transcription. It "Unzips" the double helix and adds complementary bases to match one of the two DNA stands

Promoter

Region on the DNA that RNA polymerase attaches to during transcription

Template

The DNA strand used to make RNA

RNA ribonucleic acid

The molecule that actually uses the genetic info to directly control protein synthesis

Complementary

When two nitrogen bases pair up to form a bond they are said to be ______

Ribose

Sugar in RNA

Uracil

The nitrogen base in RNA in place of thymine

mRNA

Contains the info needed to assemble a polypeptide from the DNA in the nucleus to ribosomes in the cytoplasm


Linear shape

tRNA

Responsible for bringing individual amino acids from the cytoplasm to the ribosomes where they are incorporated into the growing polypeptide


Hairpin or cloverleaf shape

rRNA

Ribosomes are made of a combination of protein and _______. They are assembled by the nucleolus


"Globular" shape

Double helix

The molecular structure of DNA is this shape. Because it consists of two linear stands of nucleotides joined to eachother, and it is twisted in a spiral fashion