Poll EV quizzes

Question 1

What does cell theory state?

Answer 1

all living things are made up of cells

Question 2

prokaryotic cells can be distinguished from eukaryotic cells by the absence of:

Answer 2

a nucleus

Question 3

Which of the following is NOT a feature of prokaryotic and eukaryotic cells?
-ribosomes
-genetic info in DNA
-plasma membrane
-cytoplasmic organelles such as ER and golgi

Answer 3

Cytoplasmic organelles

Question 4

Which type of biomolecule is the main source of quick energy for living things?

Answer 4

carbohydrates

Question 5

What level of protein structure results from folding into a helices or bsheets?

Answer 5

secondary structure

Question 6

Denaturation of a protein disrupts what structure(s)

Answer 6

disrupts secondary and tertiary structures

Question 7

Which characteristic of a phospholipid contributes to membrane fluidity?

Answer 7

double bonds in the fatty acid tail

Question 8

Most functions of cell membranes are carried out by:

Answer 8

proteins

Question 9

How do cells transport small, nonpolar, hydrophobic molecules across a membrane?

Answer 9

these molecules diffuse freely

Question 10

What is the role of ATP in primary active transport?

Answer 10

ATP is used to pump molecules against their concentration gradient

Question 11

Which of the following can freely diffuse across a cell membrane
-oxygen
-potassium ions
-glucose
-protons

Answer 11

oxygen

Question 12

Mitochondria are sites of (3)

Answer 12

-synthesis of certain amino acids
-synthesis of heme groups
-uptake of Ca ions

Question 13

A biological redox reaction involves (3)

Answer 13

an oxidizing agent
-a reducing agent
- a gain of electrons

Question 14

Why is oxygen needed for ATP synthesis?

Answer 14

oxygen acts as the final electron acceptor at the end of the ETC

Question 15

What is a common characteristic of all proteins in the ECM?

Answer 15

the presence of domains with specific binding sites

Question 16

All collagen family members consist of __ chains arranged in a __ in at least part of their length

Answer 16

3
triple helix

Question 17

The endocytic pathway:

Answer 17

moves materials from the outside of the cell to the inside of the cell

Question 18

The signal sequence is found on the N terminus of__

Answer 18

secretory proteins

Question 19

Which structure is not a part of the endomembrane system?
-nuclear envelope
-mitochondria
-golgi
-ER

Answer 19

mitochondria

Question 20

Where does glycosylation take place?

Answer 20

the golgi complex AND rough ER

Question 21

Which process does not take place in the golgi complex?
-glycosylation of proteins’
-digestion of misfolded proteins
-processing membrane proteins
-processing lysosomal proteins

Answer 21

digestion of misfolded proteins

Question 22

Which residues act as a delivery address of proteins to lysosomes?

Answer 22

mannose 6 phosphate

Question 23

In phagocytosis, the phagosome fuses with which organelle leading to digestion?

Answer 23

lysosome

Question 24

Do eukaryotic cells have a cytoskeleton?

Answer 24

yes

Question 25

Which cytoskeleton element does not associate with motor proteins

Answer 25

intermediate filaments

Question 26

Which direction does Kinesin 1 transport cargo?

Answer 26

outwardly towards + end of microtubules

Question 27

Which direction does dynein transport cargo?

Answer 27

inwardly towards the - end of microtubules

Question 28

What is a function of centrosomes?

Answer 28

facilitating microtubule nucleation

Question 29

Is there a difference between cilia and flagella?

Answer 29

no

Question 30

How many genes encode intermediate filaments?

Answer 30

70

Question 31

Are actin filaments associated with motor proteins?

Answer 31

yes

Question 32

What will cause DNA to have a higher melting temp?

Answer 32

higher GC content

Question 33

Transposase is an enzyme that ____

Answer 33

catalyzes transposon excision from a donor DNA site and its subsequent insertion to the target DNA site

Question 34

What is the histone structure consist of?

Answer 34

a core histone octamer + 1 linker histone

Question 35

______ is also known as light chromatin and can actively undergo ___

Answer 35

euchromatin, transcription

Question 36

The DNA protein complex that comprises eukaryotic chromosomes is called ___

Answer 36

chromatin

Question 37

the RNA POLYMERASE MOVES ALONG THE DNA TEMPLATE IN TEH ____ DIRECTION

Answer 37

3 - 5

Question 38

Prokaryotes have ___ RNA POLYMERASES, eukaryotes have ___

Answer 38

1, several

Question 39

Does eukaryotic transcription take place in the cytoplasm?

Answer 39

no

Question 40

the creation of a stop codon in the middle of a coding sequence is called a ____

Answer 40

nonsense mutation

Question 41

What is the amino acid used as a start codon?

Answer 41

methionine

Question 42

DNA methylation is thought to serve as an ____ marker

Answer 42

epigenetic

Question 43

In the absence of lactose, what is expected to happen in the LAC operon?

Answer 43

respressor protein will bind to the operator site

Question 44

The length of the POLYA tail is affects ____

Answer 44

longevity of mRNA

Question 45

Why is DNA replication called semiconservative?

Answer 45

each daughter duplex contains one strand from the parent structure

Question 46

When do most of the prep for mitosis occur, including DNA replication

Answer 46

interphase

Question 47

What is responsible for holding sister chromatids together after replication?

Answer 47

Cohesin

Question 48

Which stage of mitosis involves the reformation of the nuclear envelope, disassembly of the mitotic spindle?

Answer 48

telophase

Question 49

During ____ spindle fibres attach to the centromeres of each chromosome

Answer 49

prometaphase

Question 50

What enzyme will catalyze the cutting of PIP2 into IP3 and DAG in cell signalling?

Answer 50

phospholipase C

Question 51

RTKs are _______

Answer 51

autophosphorylated by its catalytic subunits

Question 52

A mutation that changes a codon sequence and subsequently changes the amino acid that should have been placed at that point is called a _______

Answer 52

missense mutation

Question 53

Transcription occurs in the ____ and translation occurs in the ___ of prokaryotic cells

Answer 53

cytoplasm for both

Question 54

following transcription the RNA has a complementary strand of the ____

Answer 54

template strand of DNA

Question 55

Which event occurs just adter eukaryotic mRNA being transcribed?

Answer 55

removal of introns

Question 56

The polyA tail is added to what molecules?

Answer 56

eukaryotic mRNA

Question 57

What will 3H thymidine do?

Answer 57

radiolabel newly synthesized DNA

Question 58

What event is most likely to trigger a delay in movement to anaphase through monitoring the spindle checkpoint?

Answer 58

failure to align at the metaphase plate