Biology Practical #2 Flashcards
1
Q
1.Why did we boil half the corn seeds/kernels?
A
Kill the embryo then you get a negative control.
2
Q
- What is a redox reaction?
A
- Reduction and oxidation occur together
3
Q
Tetrazoliom=dehydrogenas=formazin
- What is the enzyme?
- What is the active site of the enzyme?
- Name the substrate?
- name the product?
- Why didn’t the stored food in the live corn seeds show red color?
A
- dehydrogenas
- Tetrazoliom
- Tetrazoliom
- formazin
- It’s only starch stored food not live cells starch doesn’t have enzymes
4
Q
List the layers of tissues in a cross-section of a leaf.
A
8.
5
Q
9.In which layers does photosynthesis occur?
A
9
6
Q
10.What is a soma/stomate?
A
- Its an opening into an air space On either side there is a guard cell
7
Q
11.Why are stomates necessary?
A
- Regulates gases that are involved in photosynthesis carbon dioxide in out oxygen.
8
Q
- What is the function of the guard cells?
A
12 opens and closes the stomate
9
Q
13.How are they(guard cells)different from the other lower epidermis cells?
A
13 they have chloroplasts
10
Q
- Which 2 slides did we use to study mitosis?
A
- Onion root tip and Whitefish Blastula
11
Q
15.What is a blastula?
A
- Blastula= early embryo
12
Q
- What type of cell division (mitosis or meiosis) is used to produce animal gametes?
A
- Meiosis
13
Q
- What type of cell division is used when in embryo grows?
A
- Mitosis
14
Q
- What type of cell division produces genetically identical daughter cells?
A
- Mitosis
15
Q
- How many times does DNA replication in mitosis?
A
- Once in the S phase of Interface
16
Q
20.How many times does DNA replication in meiosis?
A
- Once S phase of meiosis.
17
Q
21.What happens in anaphase of mitosis?
A
- Separation of sister chromatids.
18
Q
- What happens in anaphase 1 of meiosis?
A
- Separation of
homologous-chromosomes. 2N to 1N
19
Q
- What happens in anaphase two of meiosis.
A
- Separation of sister chromatids
20
Q
- how many daughter cells tresult in mitosis?
A
- Two
21
Q
- How many daughter cells result in meiosis?
A
- Four
22
Q
- What is cytokinesis?
A
- Division of the cytoplasm and organelles.
23
Q
- How does cytokinesis occur in plant cells?
A
- Cell plate
24
Q
- How does cytokinesis occur in animal cells?
A
- The microfilaments pinch on cytoplasm causing this cleavage furrow.
Answer: cleavage furrow
25
29. What is the role of microtubules in cell division?
29. They make up the spindles and centrals
26
30. What is the role of micro filaments in cell division?
30. Cytokinesis
27
31. Engineering which base is complementary to A to C to G to T?
```
31.
A-T
C-G
G-C
T-A
```
28
32. Name the three parts of a nucleotides together?
32. Five carbon sugar, phosphate, nitrogenous base
29
34. What type of bond binds the two DNA strands together?
34. Hydrogen.
30
35. In the extraction of DNA from strawberries what was the purpose of the soap?
35. Breaks up the cell membrane
31
36. What was the purpose of the salt?
36.
32
37. What was the purpose of the cold alcohol (ethanol)?
37. Silicified the DNA
33
33. What type of bond holds nucleotides together?
33. Covalent bond
