Biology

The diagram below shows a normal gene sequence and three mutated sequences of a segment of DNA. Which row in the chart correctly identifies the cause of each type of mutation?

1

In a DNA sample, 15% of the bases are thymine (T). What percentage of the bases in this sample are adenine (A)?

15%

How many different types of amino acids are there?

20

The alterations is most likely the result of

A deletion of base 4

which applicant would qualify for job A- which applicant would qualify for job B-

A- Transfer RNA B- DNA

two chemical equations are shown below

A- maltase B- lipase

in a portion of a gene, the nitrogenous base sequence is T-C-G-A-A-T. Which nitrogenous base sequence would normally be found bonded to this section of the gene?

A-G-C-T-T-A

color change in tube 2

Carbon dioxide was added to the water

animal cells utilize many different proteins Discuss the synthesis of protein in an animal cell.

DNA codes for the amino acid sequence and DNA provides instructions for making proteins.

.What is the relationship between an organism's DNA and protein specificity?

DNA determines the amino acid sequence of each protein

The most likely result of completely removing carbon dioxide from the environment of a plant is that sugar production will

Decrease and eventually stop

the shape of a protein is most likely directly determined by the

Kind and sequence of amino acids in the protein

Two black discs are opposite each other on each side of each two leaves

Light is necessary for photosynthesis

which sequence represents structures organized from least complex to most complex?

Nucleus, nerve cell, brain, nervous system

For which organic compounds must information be encoded in DNA for green plants to synthesize the other three compounds?

Proteins

when water is available and growth begins. .

Ribosomes

The instructions for the genetic traits of an organism are directly determined by the

Sequence of bases in DNA molecules

Part of a molecule found in cells is represented below. Which process is most directly affected by the arrangement of components 1 through 4?

Sequencing of amino acids in cells

explain how the two organelles in the set you selected interact to carry out the cellular process you identified in the previous question?

Set A; The nucleus contains DNA that provides the code to proteins to carry out to the ribosomes Set B: The cell membrane allows substances like oxygen and sugar needed by mitochondria needed for cellular respiration to enter the cell

Describe how a protein would be changed if a base sequence mutates from GGA to TGA?

The protein synthesized may not work properly

molecule B could enter the cell as a direct result of?

active transport

the basic building blocks of proteins are?

amino acids

A DNA segment removed from neurospora (a pink mold) contained the base sequence G-T-C-C-A-T-G-C-A. A similar segment of DNA removed from neurospora that had been exposed to radiation for several hours had the base sequence G-T-C-C-A-T. This change in the base sequence is an example of

deletion

The diagram below shows some of the steps in protein synthesis? The section of DNA being used to make the strand of mRNA is known as a

gene

The weakest bonds in a double-stranded molecule of deoxyribonucleic acid exist between the

nitrogenous base

If strand B represents messenger RNA, it would transport the genetic code from the

nucleus to ribosome

The data table below summarizes the percentage composition of samples of DNA taken from several species of organisms? One conclusion that can be made based on this data table is that the

percentage of purines is almost equal to the percentage of pyrimidines in all the organisms

Which nuclear process is represented below?

replication

he diagram below represents a segment of a gene on two chromosomes. The change in the gene sequence is an example of

substitution

which of the following is a primary nutrient?

sugar