1. A testable explanation of a broad range of related phenomena that is relied upon by scientists with a high degree of confidence is referred to as ________. (Points : 5)
an act
a law
a theory
a dogma
2. The smaller unit molecules (monomers) which combine to form proteins and polypeptides are called ____________. (Points : 5)
fatty acids
monosaccharides
amino acids
nucleotides
3. Enzymes, some hormones, and structural molecules like keratin and collagen are examples of ______________. (Points : 5)
nucleic acids
carbohydrates
lipids
proteins
4. An atom that has gained or lost electrons is referred to as _______________. (Points : 5)
an ion
a molecule
an isotope
an element
5. Cell membranes consist of _____________. (Points : 5)
a complex carbohydrate webbing
a flexible sheet of protein
a network of microfilaments and microtubules
a double layer of phospholipids
6. Which of the following transport mechanisms requires ATP to move materials across a plasma membrane? (Points : 5)
simple diffusion
facilitated diffusion
osmosis
active transport
7. A cell is placed in a solution. If the cell is observed to shrink, the solution must be _________________ relative to the interior of the cell. (Points : 5)
hypertonic
hypotonic
isotonic
toxic
8. Consider the following two statements:
(1) ” Energy can neither be created nor destroyed, but it can be changed in form.”
(2) “If energy changes form, the change is never 100% efficient.”
(Points : 5)
These statements are expressions of the 1st and 2nd energy laws.
These statements don’t apply to any cells.
These statements are both false.
These statements apply only to eukaryotic (higher) cells.
9. The part of an enzyme that “fits” its substrate is called its __________ site. (Points : 5)
repressor
promoter
active
operator
10. In higher cells, cellular (aerobic) respiration with production of adenosine triphosphate (ATP) is carried out in the _______________. (Points : 5)
mitochondrion
nucleus
plasma membrane
endoplasmic reticulum
11. Meiosis differs from mitosis because _______________. (Points : 5)
meiosis results in diploid daughter cells
meiosis involves two cell divisions
DNA replicates before the start of meiosis
meiosis occurs all over the human body
12. Leaves are green because ____________. (Points : 5)
carotenoids absorb green light
carotenoids reflect green light
chlorophylls a and b absorb green light
chlorophylls a and b reflect green light
13. Many human traits such as eye color and height are controlled by _______________. (Points : 5)
sex-linked inheritance
Mendel’s laws
polygenic inheritance
incomplete dominance
14. ______________ is a nucleic acid base found in ribonucleic acid (RNA) but not in deoxyribonucleic acid (DNA). (Points : 5)
Thymine (T)
Guanine (G)
Cytosine (C)
Uracil (U)
15. Which of the following is not a possible outcome of recombinant deoxyribonucleic acid (rDNA) technology? (Points : 5)
mass production of human hormones by bacteria
estimating the age of a rock sample
increasing the production of hardier crops
correcting a human disease
16. The polymerase chain reaction (PCR) is a method of ________________. (Points : 5)
mass-producing proteins
speeding up the production of mRNA proteins
making multiple identical copies of small amounts of DNA
decoding the nucleotide sequence of a gene
17. Which of the following is most likely to cause a cell to become cancerous? (Points : 5)
mutation of a tumor supressor gene
premature apoptosis
cytokinesis
contact inhibition
18. The normal complement of sex chromosomes for a human male is ___________. (Points : 5)
YY
XY
XX
XXY
19. An allele is ____________. (Points : 5)
an alternate form of a gene
a gene found on different chromosomes (e.g., on chromosome numbers 1 and 5)
a gene located at two different positions on the same chromosome
a sex cell
20. A visual display of metaphase chromosomes arranged by size, shape, and banding pattern is ______. (Points : 5)
a genetic disorder
a centrosome
a karyotype
amniocentesis
Why Choose Us
Quality Papers
We value our clients. For this reason, we ensure that each paper is written carefully as per the instructions provided by the client. Our editing team also checks all the papers to ensure that they have been completed as per the expectations.
Professional Academic Writers
Over the years, our Acme Homework has managed to secure the most qualified, reliable and experienced team of writers. The company has also ensured continued training and development of the team members to ensure that it keep up with the rising Academic Trends.
Affordable Prices
Our prices are fairly priced in such a way that ensures affordability. Additionally, you can get a free price quotation by clicking on the "Place Order" button.
On-Time delivery
We pay strict attention on deadlines. For this reason, we ensure that all papers are submitted earlier, even before the deadline indicated by the customer. For this reason, the client can go through the work and review everything.
100% Originality
At Essay USA, all papers are plagiarism-free as they are written from scratch. We have taken strict measures to ensure that there is no similarity on all papers and that citations are included as per the standards set.
Customer Support 24/7
Our support team is readily available to provide any guidance/help on our platform at any time of the day/night. Feel free to contact us via the Chat window or support email: support@acmehomework.com.
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
Our Services
Essay USA has stood as the world’s leading custom essay writing services providers. Once you enter all the details in the order form under the place order button, the rest is up to us.
Essays
At Essay USA, we prioritize on all aspects that bring about a good grade such as impeccable grammar, proper structure, zero-plagiarism and conformance to guidelines. Our experienced team of writers will help you completed your essays and other assignments.
Admissions
Admission and Business Papers
Be assured that you’ll definitely get accepted to the Master’s level program at any university once you enter all the details in the order form. We won’t leave you here; we will also help you secure a good position in your aspired workplace by creating an outstanding resume or portfolio once you place an order.
Editing
Editing and Proofreading
Our skilled editing and writing team will help you restructure you paper, paraphrase, correct grammar and replace plagiarized sections on your paper just on time. The service is geared toward eliminating any mistakes and rather enhancing better quality.
Coursework
Technical papers
We have writers in almost all fields including the most technical fields. You don’t have to worry about the complexity of your paper. Simply enter as much details as possible in the place order section.