Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Biology Expert

1. Which of the following is an accurate statement concerning the differences between DNA and RNA?

a. RNA is usually double-stranded, but DNA is usually single-stranded.
b. RNA has the sugar deoxyribose, but DNA has the sugar ribose.
c. RNA contains three different nucleotides, but DNA contains four different nucleotides.
d. RNA lacks the base thymine (which is found in DNA) and has uracil instead.

2. The DNA sequence of a codon in a gene was changed from AAT to AAC. This type of mutation is called a(n) __________.
a. point mutation
b. insertion mutation
c. deletion mutation

3. The cells in your skin have a different shape and different function from the cells in your liver because the two types of cells have different __________.

a. DNA
b. proteins
c. lipids
d. carbohydrates

4. Genetic recombination (crossing over) produces __________.

a. new chromosomes
b. mutations
c. new combinations of alleles
d. longer chromosomes

5. Which one of the following statements is true?
a. An allele is either dominant or recessive, not in between.
b. A particular gene can have only two alleles.
c. A single trait can be affected by many different genes.
d. The environment is irrelevant to gene expression.

6. What is the root cause of sickle-cell anemia?

a. mutations in the gene that directs the synthesis of the hemoglobin protein
b. an amino acid substitution in the hemoglobin protein
c. malaria
d. abnormally shaped red blood cells

7. What are restriction enzymes?

a. enzymes that are limited (i.e., restricted) in how big they can become
b. vitamins such as vitamin A
c. plasmids
d. enzymes that cleave through a DNA helix wherever they encounter a specific sequence of nucleotides

Biology, Academics

  • Category:- Biology
  • Reference No.:- M924266

Have any Question? 


Related Questions in Biology

Write a 500-750 word essay about globalwarming that

Write a 500-750 word essay about globalwarming that addresses the following points: 1. What is global warming? 2. Describe how human activities impact globalwarming 3. Explain what an individual can do tominimize his/her ...

1 mediterranean climates like those in central california

1. Mediterranean Climates, like those in Central California, experience extremely hot and dry summers and relatively cool and moist winters. Relate the soil-water balance to the growth strategies of plants in this region ...

Anesthesiathere are two questions to this discussion

Anesthesia There are two questions to this discussion; answer  both  questions. Question A The textbook says that the common anesthesia time units are 15 minutes, but that some carriers use 30 minutes. Not mentioned in t ...

Please help me with these questions1 describe how sex is

Please Help me with these questions: 1. Describe how sex is determined in humans 2. Describe what sex linkage is and give an example 3. Define dosage compensation. 4. Define nondisjunction and describe a scenario in whic ...

Given what you know about how natural selection works

Given what you know about how Natural Selection works, explain why Sickle cell disease hasn't been eradicated from the population.

Anakin with a genotype of ao rhd- has fraternal twins luke

Anakin with a genotype of A/O RhD+/- has fraternal twins (Luke and Leia) with Padme, whose genotype is A/O RhD-/-. Luke and his uncle Owen have never had their blood type tested. Leia has her blood typed and it is A RhD+ ...

Which type of reproduction occurs through the formation of

Which type of reproduction occurs through the formation of different types of spores in favourable and unfavourable conditions by division of the protoplast

Which part of the human brain is the centre of memory

Which part of the human brain is the centre of memory, learning, thinking and reasoning?

Identify the waveforms in a normal electrocardiogram ecg

Identify the waveforms in a normal electrocardiogram (ECG), and relatethe ECG waveforms to atrial and ventricular depolarization andrepolarization and to the activity of the conduction system.

You are caring for a patient who is extremely ill but might

You are caring for a patient who is extremely ill, but might be helped if he could get access to a drug that is already approved in Europe. Write a paragraph describing why it is sometimes a good thing for drugs not to b ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen