Bio Lab Exam 2

Front 1

T or F: Antibiotics are used to treat viral infections

Back 1

false

Front 2

An affected individual for an autosomal recessive genetic disorder is:

Back 2

homozygous recessive

Front 3

T or F: The dependent variable is usually held at its default level or is not present in the control group

Back 3

false

Front 4

T or F: All variables not under study in an experiment can be kept the same between control and experimental groups

Back 4

false

Front 5

In the gel electrophoresis experiment what was the probable charge of the molecules that moved fastest to the positive end of the gel chamber?

Back 5

Negative

Front 6

Which of the following is an example of heterozygous genotype?

Back 6

Aa

Front 7

T or F. you test a new antibiotic to see if it is effective at killing bacteria. The antibiotic is the independent variable

Back 7

True

Front 8

Plants from which group have flagellated sperm

Back 8

mosses

Front 9

T or F: a sporophyte produces spores

Back 9

True

Front 10

In pea plants, the tall allele is dominant to the dwarf allele. What phenotypic ratio would you expect to get from a cross of a homozygous tall plant with a homozygous dwarf plant?

Back 10

all tall plants

Front 11

Humans are ________ organisms

Back 11

eukaryotic

Front 12

In monohybrid cross the expected genotypic ratio of the offspring is:

Back 12

1:2:1 (phenotypic is 3:1)

Front 13

T or F: Gymnosperms are gametophyte dominant

Back 13

false

Front 14

T or F: When testing the effects of an antibiotic on two types of bacteria to see which bacterial type is more susceptible, the bacteria type is the independent variable

Back 14

True

Front 15

How many offspring are expected to have dominant phenotype in a monohybrid cross?

Back 15

3

Front 16

T or F: most environmental bacteria are helpful to human interests

Back 16

True

Front 17

True or False: X-Linked genes occur only on the X chromosome

Back 17

True

Front 18

A negative control:

Back 18

Does not contain the substance you are testing for

Front 19

Mosses have which of the following characteristics?

Back 19

-flowers, seeds

-seeds, vascular tissue

-vascular tissue, flagellated sperm

*cuticle, flagellated sperm

Front 20

Use a Punnet Square to determine the probable outcome of crossing individuals who are heterozygous for a single genetic trait (a monohybrid cross). What percent of the offspring is expected to display the phenotype of the dominant allele?

Back 20

75%

Front 21

T or F: Antibiotics may affect Gram negative bacteria differently than Gram positive bacteria

Back 21

True

Front 22

Which of the following plants has fruits?

Back 22

-mosses

-ferns

-gymnosperms

*angiosperms

Front 23

In Mendelian inheritance, when the genotype for one gene consists of a dominant and recessive allele, the phenotype will be:

Back 23

dominant

Front 24

True or False: A phenotype is the measurable or viewable trait for a given genotype

Back 24

True

Front 25

Eukaryotes have:

Back 25

a nucleus and membrane bound organelles

Front 26

T or F: you test a new antibiotic to see if it is effective at killing bacteria. The antibiotic si the dependent variable

Back 26

False

Front 27

T or F: You test a new antibiotic to se if it is effective at killing bacteria by measuring the zone of inhibition. The zone of inhibition is the independent variable

Back 27

false

Front 28

Which of the following statements is true:

Back 28

-RNA is usually double stranded.

- T is present in RNA, but not in DNA

- U is present in DNA, but not RNA

*DNA is usually double stranded

Front 29

T or F: opportunistic infections may occur if antibiotics are used in inappropriate situations

Back 29

true

Front 30

Is the sequence A-T-T-G-G-C-A-C from a strand of RNA or DNA?

Back 30

DNA

Front 31

T or F: The working hypothesis essentially says that the independent variable is not responsible for changes in the dependent variable

Back 31

False

Front 32

We have obtained part of a DNA sequence from a jackrabbit for the spirit gene, it is A-T-G-T-C-G-A-T. What will the complementary RNA sequences be?

Back 32

UACAGCUA

Front 33

Which of the following is not a benefit of bacteria?

Back 33

atmospheric penetrance

Front 34

T or F: small sample sizes in an experimental study should reduce confidence in the results of the study

Back 34

True

Front 35

T or F: mosses are gametophyte dominant

Back 35

True

Front 36

What do we mean by the term "naked" seed?

Back 36

There is no fruit around the seed

Front 37

Which of the following organisms utilizes DNA as its genetic material but does not have their DNA encased in membrane

Back 37

-animal

-plant

*archaea

-fungi

Front 38

You should accept a working hypothesis if a ttest gives a result of > 0.05

Back 38

True

Front 39

T or F: If an organism's genotype is AA, the organism is homozygous dominant

Back 39

True

Front 40

What is the name for an evergreen?

Back 40

gymnosperms

Front 41

T or F: gymnosperms are sporophyte dominant

Back 41

True

Front 42

A male who has only one recessive allele for colorblindness, an X-linked disorder, will have what phenotype

Back 42

colorblindness

Front 43

T or F: You should accept a working hypothesis if a ttest gives a result of < 0.05

Back 43

True

Front 44

T or F: angiosperms are gametophyte dominat

Back 44

False

Front 45

Which of the following plants has cuticle but not vascular tissue?

Back 45

*mosses

-ferns

-gymnosperms

-angiosperms

Front 46

How many offspring are expected to be heterozygous in a monohybrid cross?

Back 46

2

Front 47

T or F: a negative control group contains the independent variable under study

Back 47

False

Front 48

You should accept a null hypothesis if a ttest gives a result of > 0.05

Back 48

true

Front 49

Males always express the allele inherited from their mother for X-linked traits, regardless of the dominant/recessive relationship that may exist for that gene

Back 49

True

Front 50

A monohybrid cross would result in which genotypes in the offspring

Back 50

AA, Aa, and aa

Front 51

What are alleles

Back 51

alternative forms of a gene for a trait, such as blue eyes or brown eyes

Front 52

T or F: a genotype can always be determined by looking at the phenotype of an individual

Back 52

false

Front 53

Colorblindness is an X-linked trait. A colorblind woman has children with a normal man. What percentage of their female offspring are expected to be colorblind?

Back 53

NONE

Front 54

Transcribe the following DNA sequence into RNA: ATACG

Back 54

UAUGC

Front 55

What kind of bond connects the two strands of DNA together?

Back 55

hydrogen

Front 56

G pairs with _____ in DNA, and _____ in RNA

Back 56

C, C

Front 57

State the central dogma of biology

Back 57

DNA is transcribed to RNA which is translated to Protein

Front 58

What process converts DNA into mRNA?

Back 58

transcription

Front 59

Which type of RNA brings amino acids to the ribosome?

Back 59

tRNA

Front 60

Why do you need 11 codons to produce a protein that is 10 amino acids long?

Back 60

you need the stop codon

Front 61

List the anticodons for the following: AUG UUC ACU

Back 61

UAC AAG UGA

Front 62

T or F: bacteria use many types of organelles, like mitochondria and a nucleus, to perform cellular functions

Back 62

False

Front 63

Describe what is meant by zone of inhibition

Back 63

its where bacteria does not grow because the antibiotic worked

Front 64

The gametophyte is dominant in

Back 64

mosses

Front 65

a gymnosperm has

Back 65

a cuticle, vascular tissue, and seeds

Front 66

List the two vascular tissues in plants and name each of their functions

Back 66

xylem: help water transport

phloem: food and nutrient transport

Front 67

all flowering plants

Back 67

have fruit