Bio 213 Babu Ch. 7-9 Exam Prep (Connect HW & Quiz)

Suppose that a substitution mutation replaces the first "A" in the following mRNA sequence with a "U":A A A G C A G U A C U AHow many amino acids will be in the polypeptide chain?

0, AA encodes a stop codon, so the polypeptide chain would not form.

Where in the cell cycle is DNA polymerase most active?

S phase(DNA Rep)

true statements about sexual and asexual reproduction.

-Cats reproduce kittens via sexual reproduction

- In general, sexual reproduction requires more energy than asexual reproduction.

- Prokaryotes and many single-celled eukaryotes reproduce asexually

-asexual reproduction only requires one parent

- sexual reproduction creates offspring that are genetically different from one another and from the parent

- asexual reproduction is most advantageous when environmental conditions are constant

Type the complementary RNA strand in the box: AATACGGCC.

UUAUGCCGG

Arrange the terms on the left in order from largest to smallest in a eukaryotic organism.

Cell, Replicated Chromosome, Chromatid, Nucleosome, Histone, Nucleotide

Select all of the following that can result from nondisjunction of the X chromosome.

an XXX female,

Klinefelter syndrome,

Turner syndrome

Replication creates a complementary strand of DNA. Given the following parental strand of DNA, what would be the nucleotide sequence of the daughter strand?AACTGGCATCGACTAGGG

TTGACCGTAGCTGATCCC

se the DNA template strand below to synthesize a polypeptide. Write your answer in the box below. Use the one-letter amino acid abbreviations in your answer (see figure 7.7). For example, if you determine the amino acid sequence is serine-proline-lysine, type SPK as your answer. AATACGGCC.

LCR

false statements about sexual and asexual reproduction.

-sexual reproduction is most advantageous when in unchanging environments

-sexual reproduction creates offspring identical to parents

- sexual reproduction begins when two cells separate

Consider the types of mutations and the circumstances in which mutations arise to label the TRUE statements below.

-Mutagens and meiosis are two sources of mutation.

-A single-base insertion is usually more harmful than a single-base substitution.

-Mutations can be useful to the organism

What is wrong with the following piece of mRNA? TACCAGGATCACTTTGCCA

It contains T and not U

Arrange the phases of mitotic cell division in chronological order. Begin the series with the first step after interphase.

Prophase,Metaphase,Anaphase, Telophase, Cytokinesis

Metaphase

Chromosomes align at the equator of the cell

Prophase

Condense and continue to become visible

Telophase

Nuclear envelop forms

Interphase

DNA replicates

Cytokinesis

Cytoplasm divides

Anaphase

Centromeres split. Sister chromatids (now chromesomes) are pulled towards the opposite ends of the cells

What type of RNA carries the information that specifies a protein?

Messenger RNA (mRNA)

The chromosomal designation for a human male is

XY

Initiation, elongation, and termination re the three main steps in

transcription and translation

In DNA molecules

adenine pairs with thymine

Meiotic cell division replicates a cell's DNA _______ and then divides________.

once, twice

The DNA sequence ATGCATGC will pair with which of the following RNA strands.

UACGUACG

The replication of DNA during the eukaryotic cell cycle occurs during

interphase

In meiosis, homologous chromosomes align next to one another during

Metaphase I

2n is an abreivation for

diploid

In meiosis, homologous chromosomes seperate during

anaphase I

Mitosis is used for all of the following except

formation of gametes

RNA differs from DNA in many ways including:

All answers are correct:

-RNA can catalyze some chemical reactions and DNA cannot

-DNA contains deoxyribose and RNA contains ribose.

-DNA is double stranded and RNA is single stranded

-DNA contains thymine and RNA contains uracil instead of thymine

In Eukaryotic cells, sequences of mRNA removed before translation are called

introns

Meiosis is a process used for

Production of gametes

The rungs of DNA ladders are formed by base pairs

joined by hydrogen bonds

The two main stages of the eukaryotic cell cycle are

mitosis and cytokinesis

DNA differs from RNA because unlike RNA

DNA contains thymine

The phase of mitosis in which the chromosomes are alligned along the equator of the cell is

metaphase

A DNA sequence that signals the start of a gene is

a promoter

Which of the following is NOT a cause of mutation

All of the choices are causes of mutations:

-Exposure to radiation

-Errors in DNA replication

-Errors during meiosis

-exposure to tobacco