1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alina1380 [7]
4 years ago
15

How would you test the presence of starch in leaves?

Biology
1 answer:
Lesechka [4]4 years ago
4 0

Answer:

1. Remove a green leaf from the plant

2. Boil the leaf in boiling <u>water stop enzymatic reaction within cells in leaf</u>

3. Put the boiled leaf in boiling tube containing alcohol <u>extract (ethanol) chlorophyll ethanol dissolves Lipids in cell membranes.</u>

4. Return to leave to the hot water <u>soften the leaf and allows penetration of </u><u> </u><u>i</u><u>odine</u>

5. Remove leaf and perform the iodine test

Explanation:

<em>starch is white powdery substance consisting of glucose which is used by plants as food the percents of starch in leaves evidence enough of the process a photosynthesis being carried out in leaves as the formation of starch necessitates photosynthesis</em>.

I hope this helps :)

You might be interested in
Why are Chongqing, Wuhan, Nanjing, Shanghai and Anqing called the Five Tigers of the Yangtze River?
ra1l [238]

Answer:

Chongqing, referred to as Ba and Yu, also known as Bayu, Shancheng, Yudu, and Qiaodu, is one of the four central municipalities in China, five national central cities, a national historical and cultural city, and the world's hot spring capital; the four major international metropolises positioned by the State Council, the Yangtze River It is the economic center, financial center and innovation center of the upstream region, as well as the center of politics, shipping, culture, science and technology, education, communication, etc., the national comprehensive transportation hub, and the large-scale water, land and air transportation hub in the western region. Chongqing is located in the southwest of China, in the core area of ​​the economic belt in the upper reaches of the Yangtze River, surrounded by the Yangtze River and the Jialing River.

Explanation:

8 0
2 years ago
How are cancer therapies tailored to nucleotide synthesis -explain using the example of fluorouracil and methotrexate.
nika2105 [10]

Answer:

By preventing the synthesis of DNA halting cell growth.

Explanation:

Fluorouracil and methotraxate prevent the synthesis of the neucleoside Thymidine thus preventing DNA replication and elongation. Methotraxate has a structure analogous to Folic acid which is important for thymidine synthesis. Thus, it acts as a competitive inhibitor on dihdrofolate reductase an enzyme that is essential for tetrahydrofolate formation, a folic acid derivative.

Fluorouracil acts by inhibiting thymidylate synthase which catalyses an essential step in Thymidine synthesis.

3 0
4 years ago
Use the double-stranded DNA molecule below to answer the following questions. The first pair of nucleotides (bolded) contains th
krok68 [10]

Answer:

The correct answer is 2. 5'-AUGUCAGGUACGCCACAU-3'

Explanation:

The template strand for transcription is 3'-TACAGTCCATGCGGTGTA-5 and RNA polymerase will add complementary mRNA sequence against this strand in the opposite direction i.e., 5' to 3' direction.

In RNA, A(adenine) makes complementary base pairing with U(uracil), not with T(thymine) and the rest of the base-pairing is same as in DNA. Therefore the correct mRNA produced from the transcription of this DNA molecule by the help of RNA polymerase is 5'-AUGUCAGGUACGCCACAU-3'.

Then this mRNA sequence will be used by ribosomes to synthesize proteins during the translation process.

7 0
3 years ago
What are living things made of?
labwork [276]
All living things are made up of cells.
8 0
3 years ago
Read 2 more answers
Which antiinfective agent may lead to blindness if not used correctly by the client in prescribed amounts?
Ilia_Sergeevich [38]
<span>Chloroquine could lead to blindness if it is not used properly. This anti-infective can accumulate in the retina or optic nerves and lead to blindness if overused. This medicine is typically used as a way of combating malaria, but as shown, it can have side effects that are very negative.</span>
8 0
3 years ago
Other questions:
  • Detached earlobes are dominant. If a mother has the genotype Ee and a father have the genotype Ee. What is the chance that their
    15·1 answer
  • Explain why damage to the neck can cause quadriplegia (loss of use of arms and legs)
    13·1 answer
  • Select all the depositions features that are listed below.
    6·1 answer
  • Which of the following tasks is an example of how scientists might use writing skills in their jobs?
    5·1 answer
  • How to minimize flood​
    11·2 answers
  • Black panthers eat other animals in their ecosystem, including deer, fish, birds, and rabbits. Which of the following terms best
    10·1 answer
  • Describe the type of organisms that are classified into the achaea domain
    14·1 answer
  • Help please thanks This is for Science
    15·1 answer
  • Helppppppp my friend she struggling the pic is below
    12·2 answers
  • Which of the following best describes the significance of the sequence of an individual’s DNA
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!