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amm1812
3 years ago
11

What is a cell membrane?​

Biology
2 answers:
Lostsunrise [7]3 years ago
8 0

The cell membrane is a thin semi-permeable membrane that surrounds the cytoplasm of a cell. Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell while keeping other substances out.

Semenov [28]3 years ago
4 0

Answer:

The cell-membrane or plasma membrane surrounds nucleus and cytoplasm in all types of cells. However in bacteria and plants,plasma membrane itself is surrounded by a cell-wall.It can repair itself to some extent.Different models have been presented to understand the structure of cell membrane.

Explanation:

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From left to right, which is the sequence of the<br> complementary strand of DNA in this molecule?
ladessa [460]

Answer: Option A) A-C-T-T-G

Explanation:

The base sequence on a strand of DNA is usually paired to specific complimentary bases. These specific pairings are as follows:

Adenine (A) pairs with Thymine (T)

Guanine (G) pairs with Cytosine (C). So when you find A replace with T, so also replace C with G and vice versa.

Thus, the complimentary sequence of the T-G-A-A-C DNA strand is A-C-T-T-G

4 0
4 years ago
What is the purpose of using a pedigree?
Fiesta28 [93]

Answer:

The pedigree chart are used to check the mode of inheritance of certain trait.  

Explanation:

The pedigree is used to know the probability of the offspring getting a particular disorder or condition. It also help to discover the location of the defected gene. And through it can also be predicted that weather it will be a dominant or a recessive trait. For this pedigree data of several generations are required. Here, the phenotype ratios of the offspring can be accurately determined only when the genotypes of the parents are known.

8 0
3 years ago
Please help.
MrRa [10]

Answer:

1. F 2. F

Explanation:

im not sure about the second one tho but im definitly sure about the first one :)

8 0
3 years ago
Please help me I really need the answers!!!!!
SpyIntel [72]

Answer:

1. GUG CAC CUG ACU

2. Val-his-leu-thr

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8 0
3 years ago
How are primary, secondary, and tertiary consumers different from each other?
mamaluj [8]

Answer:

Primary consumers are animals that eat primary producers; they are also called herbivores (plant-eaters). Secondary consumers eat primary consumers. They are carnivores (meat-eaters) and omnivores (animals that eat both animals and plants). Tertiary consumers eat secondary consumers.

Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants.

Summary. Autotrophs store chemical energy in carbohydrate food molecules they build themselves. Most autotrophs make their "food" through photosynthesis using the energy of the sun. Heterotrophs cannot make their own food, so they must eat or absorb it.

Explanation:

8 0
3 years ago
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