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3 years ago

Which of the following substances protect skin from ultraviolet radiation?

2 answers:

7 0

<span>synthesize melanin which is responsible for skin color and absorbs ultraviolet radiation to protect skin from damaging effects of sunlight</span>

charle [14.2K]3 years ago

4 0

<span>contains waterproof substances including keratin</span>

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How do eukaryotic plant and animal cells differ from one another?

Ber [7]

Answer:

The eukaryotic plant animal cells are differ having some cell organelles in it.

Explanation:

The first difference is the cell wall, which is present in all eukaryotic plants. It gives shape and rigidity to the plants. But all the animal cell the outer covering is cell membrane. They lack cell wall.

All the plant cell have chlorophyll pigment. It helps them to photosynthesis. In animal cell, chlorophyll molecule are absent. So they depend on plants for their food.

The eukaryotic plant cell more space is occupied by the vacuoles. It stores food and water for the plants. However, animal cells have no vacuole or if present, it is very small in size.

All animal cells have lysosomes, which help in digestion of various materials in the cell. Plants does not contain lysosomes.

Besides this organelles all other structure of plant and animals are similar. They both have nucleus, DNA, cytoplasm, mitochondria, etc.

4 0

3 years ago

An organism is described as 2n = 48.A) How many chromatids per chromosome are in one meiotic cell during prophase 2?B) How many

Alex

Answer:

A) 48

B) 96

C) 48

D) 48

Explanation:

Attached is a table summarizing the number of chromosomes and chromatids in the different stages of mitosis and meiosis in humans who are described as 2n = 46.

For the organism which is described as 2n = 48, substitute 46 in the table for 48 to get the appropriate figures.

4 0

3 years ago

The creation of agencies mostly involves this branch of government.

Tpy6a [65]

Answer:

The executive branch carries out and enforces laws. It includes the President, Vice President, the Cabinet, executive departments, independent agencies, boards, commissions, and committees.

7 0

2 years ago

Unlike skeletal muscle action potentials, cardiac muscle action potentials __________.

ivolga24 [154]

Answer:

involve calcium voltage-gated channels

Explanation:

5 0

2 years ago

How many atp equivalents are consumed in the conversion of each of the following to a glucosyl residue in glycogen?

Nina [5.8K]

<h3><u>Answer;</u></h3>

Dihydroxyacetone phosphate - 1

Fructose-1,6-bisphosphate - 1

Pyruvate - 13

G-6-P - 1

<h3><u>Explanation;</u></h3>

1) Dihydroxyacetone phosphate = 1

G1P + GTP --> UDPG + PPi two P is equivalent to 2 ATP --->2 ADP + Pi) Therefore, two ATP equivalents - but UDP is the product and only one P needed

2 DHAP --> F1,6-BP -->F6P --> G6P -->G1P -->UDPG --> glucosyl residue

2) Fructose 1,6-bisphosphate = 1

3) Pyruvate = 13

2 pyr + 2 ATP --> 2 OAA

2 OAA + 2 GTP --> 2 PEP

2 PEP --> 2 2PG --> 2 3PG

2 3PG + 2 ATP --> 2 1,3 BPG

2 1,3 BPG + 2 NADH --> 2 G3P

2 NADH = 6 ATP

2 G3P --> DHP + G3P --> FDP -- > F6P + P

F6P --> G6P --> G1P

G1P + UTP --> UDPG + PP

4) Glucose-6-phosphate = 1

G6P -->G1P G1P + UTP --> UDP-GLC + 2 Pi

UDP-Glc + glycogen --> glycogen+ 1 Glc

4 0

3 years ago